eufy Baby S340 Smart Sock with Cam | Brand New
$299.00
Sale price
$299.00
Regular price
$549.95
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eufy Baby S340 Smart Sock with Cam | Brand New
$299.00
Sale price
$299.00
Regular price
$549.95
eufy Baby · Smart Sock S340
Sleep easy.
Both of you.
Smart sock + 2K camera. Heart rate, oxygen, sleep tracking. No monthly fees.
Brand New
0–18 Months · Up to 30 lbs
What you're getting: The complete eufy Baby S340 system — smart sock sensor, 3 sock wraps (sizes S/M/L), 2K pan-and-tilt camera, base station, and all cables. Everything works together out of the box. Package is brand new and sealed.
The numbers that matter most at 3am
2K
Camera
❤️
Heart Rate
SpO2
Blood Oxygen
330°
Pan Range
24hr
Sock Battery
AI
Cry Detection
8g
Sock Weight
$0
Monthly Fees
Two products, one system
Sock meets camera.
The S340 is a complete baby monitoring system — a wearable health tracker for your baby and a pan-and-tilt camera so you can see them. Both talk to the same app, same base station.
Smart Sock
Tracks heart rate, blood oxygen, and sleep patterns. Weighs 8 grams. Three sizes included for newborn through 18 months.
❤️
Heart Rate
O₂
Blood Oxygen
💤
Sleep
2K Camera
330° pan, 110° tilt, 4× zoom. Infrared night vision that won't disturb sleep. Two-way audio so you can soothe without getting up.
2K
Resolution
330°
Pan
4×
Zoom
Smart Sock
What it tracks.
Real-time vitals. Sleep insights. Peace of mind that fits on a tiny foot.
Heart Rate
Every beat, tracked.
Continuous heart rate monitoring while baby sleeps. Get instant alerts if readings move outside your customisable comfort zone. View up to 48 hours of historical data in the app.
Blood Oxygen
SpO2 levels, live.
Monitors blood oxygen saturation in real time using a Fresnel lens that refracts infrared light for accurate optical readings. Alerts you when levels dip outside your set range.
Sleep Tracking
Know when they're actually asleep.
The sleep algorithm analyses movement and heart rate to detect whether your baby is awake, in light sleep, or deep sleep. Daily reports show nap patterns and total sleep time. Customisable sensitivity so it works for your baby, not a textbook baby.
Alerts
The right alerts. Not all the alerts.
Customisable notifications for heart rate changes, blood oxygen dips, sock detachment, and uncomfortable sleep detection. Base station sounds an alarm and flashes red. Phone gets a push notification. You choose what triggers what.
Important: The eufy Baby S340 is a wellness tracker, not a medical device. It is not intended to diagnose, treat, cure, or prevent any medical condition. Always consult your paediatrician for medical advice. This product does not replace safe sleep practices.
Camera
See everything.
Disturb nothing.
Disturb nothing.
2K resolution with pan, tilt, and zoom. Infrared night vision that doesn't wake them up.
2K Resolution
Crystal clear, even at 3am.
2K video resolution means you can actually see details — chest rising and falling, little fingers curling, whether the dummy fell out again. Zooming in doesn't turn your baby into a pixel art project.
Pan & Tilt
330° pan. 110° tilt. 4× zoom.
Control the camera remotely from the app. Follow your baby across the crib, zoom in to check on them, or scan the entire room. No need to physically reposition the camera every time they wriggle to a new corner.
Night Vision
Non-invasive infrared.
No bright lights, no red glow, no disturbance. The infrared night vision lets you see your baby clearly in complete darkness. Because the whole point is that they stay asleep.
Two-Way Audio
Soothe from the couch.
Built-in speaker and microphone let you talk to your baby through the camera. Sing them back to sleep, shush them gently, or just let them know you're there — without getting out of bed.
AI Cry Detection
Knows when they're crying before you do.
Eufy's AI analyses audio in real time and sends you a push notification the moment your baby starts crying. Useful for the backyard, the shower, or the 30 seconds between putting dinner in the oven and checking the app. The camera doesn't just passively record — it actively listens.
The vibe
New parents don't need more things to worry about. They need one less thing to worry about.
That's what the S340 actually is. It's not a gadget. It's the thing that lets you close the nursery door and still know your baby is breathing, sleeping, and comfortable — without creeping in every twenty minutes and accidentally waking them up.
The smart sock weighs 8 grams. That's lighter than a AAA battery. Your baby won't notice it's there. But you'll notice the difference in how you feel at 2am when you glance at your phone and see a steady heart rate and a green "deep sleep" status.
The camera's infrared night vision doesn't emit any visible light. No red glow. No nightlight effect. Just a quiet little camera on a shelf that lets you see everything without being seen.
And — this is the bit we really like — there are no monthly fees. All the tracking, all the data, all the historical reports. Free. Forever. Because charging new parents a subscription to check on their baby feels like something a villain would do.
It's like having a really attentive night nurse who never calls in sick and doesn't judge your pyjamas.
⚠ The honest bit
Read this first.
This is a wellness tracker, not a medical device.
The eufy Baby S340 tracks heart rate, blood oxygen, and sleep patterns. It does NOT diagnose or monitor medical conditions. It is not a substitute for a certified pulse oximeter, a doctor, or safe sleep practices. Think of it as extra peace of mind, not medical equipment.
Smart sock fits babies 0–18 months (up to 30 lbs).
Three sock wrap sizes are included (S, M, L). The sensor attaches to the wrap and sits on top of the foot. If your baby is older than 18 months or weighs more than 30 lbs, this product isn't designed for them.
The sock sensor battery lasts ~24 hours per charge.
It charges wirelessly on the magnetic base station. A full charge takes a few hours. Realistically, you'll charge it during the day and use it at night. It becomes part of the routine — like putting on a sleep sack.
Camera and base station need to be plugged in.
The camera requires a 5V/2A USB-C power adapter (included). The base station requires a 5V/1A adapter (included). Both need to be plugged into a wall outlet. The only wireless, battery-powered component is the sock sensor itself.
Wi-Fi: 2.4GHz.
The system connects via 2.4GHz Wi-Fi and Bluetooth Low Energy 5.0. Make sure your router has 2.4GHz enabled. Most do by default.
Trust
Why CamGuard?
We're not a faceless warehouse. We genuinely want your purchase to work out.
100% Genuine Stock
Authentic eufy product. Same unit you'd get from a retail store — just without the markup.
CamGuard 1-Year Warranty
Aussie-based support from a real person. We respond within a few hours, not a few business days. Especially important when it's a baby product.
Fast Dispatch
Express shipping included in the price :) Dispatched within 1 business day from Townsville, QLD.
Specifications
Every detail.
The full spec sheet. For the parents who research everything — we see you, and we respect that.
| Smart Sock | |
| Sensor Dimensions | 42 × 38 × 13.5 mm |
| Sensor Weight | 8g (without sock wrap) |
| Sock Wrap Weight | 4g / 4g / 5g (S / M / L) |
| Sock Sizes | 3 included (S, M, L) — fits 0–18 months, up to 30 lbs |
| Tracking | Heart rate, blood oxygen (SpO2), sleep patterns, movement |
| Sleep Algorithm | Detects awake, light sleep, deep sleep states |
| Historical Data | Up to 48 hours of heart rate + SpO2 history |
| Daily Reports | Yes — sleep duration, naps, patterns |
| Battery | 80 mAh rechargeable (up to 24 hours) |
| Charging | Wireless magnetic via base station |
| Sensor Technology | Fresnel lens infrared optical sensor |
| Connectivity | Bluetooth Low Energy 5.0 (2.4GHz) |
| Wear | Either foot, dirt-resistant, washable fabric |
| Camera | |
| Resolution | 2K |
| Pan | 330° |
| Tilt | 110° |
| Zoom | 4× digital |
| Night Vision | Non-invasive infrared (no visible light) |
| Two-Way Audio | Yes (built-in speaker + microphone) |
| AI Cry Detection | Yes — real-time push notifications |
| Camera Dimensions | 81 × 81 × 107.3 mm |
| Camera Weight | 210g |
| Camera Power | USB-C (5V/2A adapter included) |
| Base Station | |
| Base Dimensions | 80 × 80 × 32 mm |
| Base Weight | 123g |
| Base Power | 5V/1A AC adapter (included) |
| Alerts | Audible alarm + red LED indicator |
| Sock Charging | Magnetic wireless dock (sock charges on base) |
| System | |
| Model | eufy Baby S340 (E8340133) |
| Connectivity | Wi-Fi + Bluetooth Low Energy 5.0 (2.4GHz) |
| App | eufy Baby (iOS + Android) |
| Room Temperature | Yes — monitored via camera |
| Monthly Fees | $0 — all features included free |
| Medical Device | No — wellness tracker only |
| Package Dimensions | 230 × 189 × 175 mm |
Compatibility
Works with.
Quick compatibility check before you buy.
- YES eufy Baby app (iOS & Android)
- YES 2.4GHz Wi-Fi networks
- YES Babies 0–18 months, up to 30 lbs (13.6 kg)
- YES Either foot (left or right)
- HSA HSA / FSA eligible
- NO 5GHz Wi-Fi (2.4GHz only)
- NO Babies over 18 months / 30 lbs
- NO Medical monitoring or diagnosis
Probably not for you if...
- ✗ Your baby is older than 18 months or weighs more than 30 lbs. The sock wraps won't fit properly and the readings won't be reliable.
- ✗ You need a medically certified pulse oximeter. This is a wellness tracker. It's designed for peace of mind, not clinical monitoring.
- ✗ You only want a camera. The S340's main value is the smart sock + camera combo. If you just need a baby cam, there are cheaper options.
- ✗ You want HomeKit or Alexa integration for the baby monitor. The S340 uses its own eufy Baby app — it doesn't integrate with smart home platforms.
Use cases
Perfect for.
- ➤ New parents who want real-time vitals monitoring without a monthly subscription
- ➤ Parents of newborns who want heart rate and blood oxygen tracking overnight
- ➤ Anyone who's tired of creeping into the nursery to check if baby is still breathing (we've all done it)
- ➤ Parents who want sleep pattern data to help establish routines
- ➤ Gift-givers looking for a genuinely useful baby shower present that isn't another onesie
- ➤ Parents who think paying $5/month to watch their own baby sleep is a bit much
Getting started
Setup in 4 steps.
Sleep-deprived-friendly instructions. No PhD required.
1
Download the eufy Baby app.
Available on iOS and Android. Create an account (or sign in if you already use eufy products). The app walks you through everything from here.
2
Plug in the base station and camera.
Connect the base station to its included 5V/1A adapter. Connect the camera to its included 5V/2A USB-C adapter. Place the base station in the nursery — this is where the sock charges and where alerts sound.
3
Pair everything in the app.
Follow the in-app prompts to connect the base station, camera, and sock sensor to your Wi-Fi (2.4GHz). The app will guide you through each step. Takes about 10 minutes.
4
Charge the sock and go.
Place the sock sensor on the magnetic base station to charge. Once charged (~a few hours), choose the right size sock wrap for your baby, attach the sensor, and pop it on their foot. Open the app and you'll see live vitals and camera feed.
Pro Tip: Charge the sock sensor during the day while baby naps in sight. Use it overnight when you need the peace of mind most. The 24-hour battery life means a once-daily charge keeps it running.
In the pack
What's included.
✓ 1x Smart Sock Sensor (80 mAh battery)
✓ 3x Sock Wraps (S / M / L — covers 0–18 months)
✓ 1x Base Station (wireless sock charger + alert hub)
✓ 1x 2K Pan & Tilt Camera
✓ 1x USB-C Power Adapter for Camera (5V/2A)
✓ 1x AC Power Adapter for Base Station (5V/1A)
✓ Charging Cables
✓ Quick Start Guide
Peace of mind
Shipping, warranty
& returns.
& returns.
We don't hide behind fine print. Especially for baby products.
Shipping
Express shipping included in the price :)
Dispatched within 1 business day from Townsville, QLD.
WA buyers: expect 2-4 business days.
Local pickup available in Townsville.
Warranty
Covered under eBay MBG
30-day protection on eligible orders.
Australian Consumer Law
Your consumer rights always apply.
CamGuard 1-Year Warranty
Aussie-based support from a real person.
Returns
Not happy? Reach out before opening a case. We're easy to deal with and want to sort things out.
CamGuard Australia is an independent importer. This is not covered by a eufy manufacturer warranty. Our in-house warranty is designed to be just as reliable, and arguably more responsive.
After-Sales Support: Got a question after your purchase? Struggling with setup at midnight? Send us a message. We respond within a few hours and we'll help you get sorted. No runaround, no ticket numbers, just a real person in Australia who's been through the newborn phase too.
FAQ
Common questions.
Q Hmm this is so cheap... is it actually new?
Yes. Brand new and sealed, never used, never paired, never activated. All components and accessories included. We import ourselves and lower our margins because everyone deserves to get decent security and not be priced out of important tech.
Q Is this a medical device?
No. The eufy Baby S340 is a consumer wellness tracker. It tracks heart rate, blood oxygen, and sleep patterns for informational purposes. It is not FDA/TGA-approved, and it should not replace medical monitoring, a doctor's advice, or safe sleep practices.
Q How accurate is the heart rate / SpO2 tracking?
eufy uses a Fresnel lens optical sensor for improved signal accuracy. It's designed for wellness-grade tracking — think Apple Watch-level, not hospital-grade. Most parents find it reliable and consistent for peace of mind. It's excellent for spotting trends and patterns.
Q Will the sock bother my baby?
The sensor weighs 8 grams — lighter than a AAA battery. The sock wrap is made from soft, breathable fabric. Most parents report their babies don't notice it at all. Three sizes are included so you get a comfortable fit from newborn through 18 months.
Q How long does the sock battery last?
Up to 24 hours on a single charge. Most parents charge it during the day on the magnetic base station and use it overnight. It's a small battery (80 mAh) so it charges relatively quickly.
Q Does the camera have a red light at night?
No. The infrared night vision is non-invasive — no visible red glow or light output. It's specifically designed not to disturb your baby's sleep.
Q Is there a monthly subscription?
No. Zero. All features — live vitals, sleep tracking, historical data, daily reports, cry detection, camera streaming — are completely free. No subscription, no premium tier, no hidden fees. It's all included from day one.
Q Does it work with Apple HomeKit / Alexa / Google?
No. The eufy Baby S340 uses the dedicated eufy Baby app (not the eufy Security app). It doesn't integrate with HomeKit, Alexa, or Google Assistant. It's a standalone baby monitoring system.
Q Can I use the camera without the sock?
Yes. The camera works independently as a baby monitor with 2K video, pan/tilt/zoom, night vision, two-way audio, and cry detection. The sock is where the vitals tracking comes in. Both are useful on their own, but the real value is using them together.
Q I'm in Australia. Will this work here?
Yes. All power adapters are included. It connects to standard 2.4GHz Wi-Fi. The eufy Baby app works in Australia. And CamGuard is based in Townsville, QLD, so if anything goes wrong you're dealing with someone in the same timezone.
eBay fields
Item specifics.
| Brand | eufy |
| Model | eufy Baby S340 Smart Sock |
| MPN | E8340133 |
| Type | Baby Monitor with Wearable Tracker |
| Connectivity | Wi-Fi (2.4GHz), Bluetooth Low Energy 5.0 |
| Camera Resolution | 2K |
| Features | Heart Rate Tracking, Blood Oxygen (SpO2), Sleep Tracking, 2K Camera, Pan & Tilt, Night Vision, Two-Way Audio, AI Cry Detection, Room Temperature |
| Power Source | AC Adapter (camera + base), Rechargeable Battery (sock) |
| Age Range | 0–18 Months (up to 30 lbs / 13.6 kg) |
| Colour | White / Blue |
| Condition | Brand New/Sealed |
| Monthly Fees | None — $0 |
| Custom Bundle | No |
| Modified Item | No |
One less thing
to worry about.
Got questions? Send us a message. We'll get back to you within a few hours — from an actual human who gets it.