1/6

eufy Indoor Siren E20

Name: eufy Indoor Siren E20 | Brand New
Brand: eufy
SKU: CG-SRE20-BN-W
Price: 119.00 AUD
Availability: InStock

Condition Brand New

$119.00

Setup One compatible HomeBase required

Build around this sensor

See what works with it and what it needs, with one kit total.

Know before you buy

The quick decision check

Condition: Brand New
Stock: Available now
Delivery · Australia Post: Express Post FREE on $99+ orders $12.95 below $99 Standard $9.95 below $99 Order total after discounts. Delivery estimates & policy
System: Alarm accessory - HomeBase required
Recording mode: Event alerts
Power: Plug-in
Compatible hubs: HomeBase 2, HomeBase 3, HomeBase Mini, HomeBase Professional S1
What you need: One compatible HomeBase required

Compatibility: Needs one compatible eufy HomeBase to operate: HomeBase Mini (firmware v4.0.5.2+), a HomeBase 2 released after 2021 (v3.4.1.2+), HomeBase 3 (v3.7.2.6+) or HomeBase Professional S1 (v4.1.4.3+). It does not work on its own and no hub is included.

AU or US HomeBase both pair fine. The “requires a US-version HomeBase” line on some eufy pages does not hold in practice.

What you need to install it

Install type: DIY
You’ll need: A compatible eufy HomeBase (not included); a power point for its USB power
Tools: None for the adhesive option; Phillips screwdriver for the screw option
Time: Under 10 minutes once your HomeBase is set up (estimate)

Installation facts checked 12.08.2026

Understand our condition grades Check eufy compatibility

Choose your viewThe essentials or the full story. Switch any time.

Simple view Product details, clearly explained. Fun viewThe Household Scramble Board The household scramble board gives the siren a control-tower briefing and keeps the flypast silent.

◻Simple view ★Fun view

eufy Indoor Siren E20 · T90R0

Your alarm, out loud.

You need: A eufy HomeBase, sold separately. HomeBase Mini, HomeBase 2, HomeBase 3 or Professional S1 runs it; it can’t work alone. Check your HomeBase ›
It does: Sounds up to 110 dB (measured at 10 cm) when a eufy sensor or panic button sets off your alarm. Up to 48 hours on its own battery in a power cut.
Condition: Brand New, sealed in eufy’s retail box, unopened and unused.
From us: 12-month CamGuard warranty · dispatched from Townsville · Express included on $99+ orders after discounts.

eufy Indoor Siren E20: a rounded white square with a grey ring on its face and a small blue light above it

How it works

A sensor trips. The siren answers.

Something sets off the alarm.
A eufy door or window sensor, a motion sensor or a panic button.
Your HomeBase passes it on.
The siren listens to your HomeBase over a Sub-1G radio link, up to 200 m away in the open.
The siren sounds.
Up to 110 dB, with its own alarm light, at the level and for the length of time you set in the eufy app.

eufy’s cutaway of a two-storey house with the Indoor Siren E20 on an upstairs bedroom wall

0Mute
60dBLow
85dBMedium
110dBHigh, the default

eufy measures every level 10 cm from the siren. There’s also a Mute button on its right side.

Works with

It takes orders from a HomeBase.

No HomeBase comes in the box. Update yours to at least the firmware below before pairing.

Tap your HomeBase

HomeBase Mini

Works. Firmware V4.0.5.2 or later.

HomeBase 2units made after 2021

Works. Firmware V3.4.1.2 or later.

HomeBase 3

Works. Firmware V3.7.2.6 or later.

HomeBase Professional S1

Works. Firmware V4.1.4.3 or later.

No HomeBase

Not compatible on its own. It needs one of the four HomeBases above to set it off.

Not sure which one you have? Check your HomeBase ›

Power

When the lights go out.

It runs on USB-C power every day. If the power cuts out, its own battery takes over.

hours

Power on

USB-C, 5 V / 1 A.

Power cut

The built-in 800 mAh battery keeps the siren going for up to 48 hours.

Power back

The battery recharges.

eufy’s figure. 48 hours comes from eufy’s lab testing; real use varies.

The siren only. Its battery doesn’t run your HomeBase, router or sensors, so the rest of your system needs its own power.

In the parcel

Your packing slip.

eufy Indoor Siren E20T90R0 · Brand New

Indoor Siren E20, mounting bracket fitted
USB power cable
An Australian power adapter
3M adhesive
Mounting screws
Quick Start Guide
eufy’s sealed retail box
Not included: a eufy HomeBase

Brand New, sealed

Factory sealed in eufy’s full retail box: unopened and unused. We describe the packaging and eufy’s published specs; we don’t open units to check them.

Where it goes

Indoors only, between 0°C and 50°C. Stand it on a desk, stick it up with the 3M adhesive or screw it to the wall. eufy suggests ear level or higher, 1.8 to 2.5 m up.

Good to know.

Does it work without a HomeBase?

No. It needs a HomeBase Mini, HomeBase 2 (units made after 2021), HomeBase 3 or Professional S1, sold separately. Update the hub’s firmware before pairing.

Can I turn it down?

Yes. In the eufy app pick mute, 60, 85 or 110 dB (the default), and set how long it sounds. There’s a Mute button on the siren too.

Can it go outside?

No. eufy designed it for indoor use only, between 0°C and 50°C.

What happens in a blackout?

Its built-in battery keeps the siren going for up to 48 hours (eufy’s lab figure), then recharges when the power’s back. It doesn’t power your HomeBase or router.

When will my order leave Townsville?

We do our best to send orders the same day; same day to 1 business day is typical from Townsville, Queensland. During busy periods it can take a little longer, though that’s rare. Australia Post delivery time is on top.

Buying from CamGuard Australia

Sent from Townsville.

Shipping

Australia Post Express is included on orders of $99 or more after discounts. Under $99.00 it’s $9.95 tracked, or $12.95 Express.

We aim to dispatch the same day; same day to 1 business day is typical from Townsville, Queensland. During busy periods it can take a little longer, though that’s rare.

Warranty

Our own 12-month warranty, not a manufacturer warranty, with Australian Consumer Law rights on top. Faulty or not as described? We cover the return postage.

Returns

Change of mind within 30 days of delivery, complete and unused. You pay return postage; the original shipping isn’t refunded.

Who you’re buying from: an independent Australian importer in Townsville, happy to answer questions before you buy.

Tech specs.

Siren

Model: eufy Indoor Siren E20 (T90R0), Brand New
Loudness: Up to 110 dB, measured at 10 cm
Levels: Mute, 60, 85 or 110 dB (default), set in the eufy app
Also: Alarm light · Mute button · alarm length set in the app

Power

Input: USB-C, 5 V / 1 A
Backup: Up to 48 hours in a power cut, eufy lab testing; varies with use
Battery: 800 mAh, 3.7 V, built in, not replaceable

HomeBase

Required: Yes, sold separately
Minimum firmware: Mini V4.0.5.2 · HomeBase 2 V3.4.1.2 (post-2021 units) · HomeBase 3 V3.7.2.6 · Professional S1 V4.1.4.3
Link: Sub-1G radio, up to 200 m in an open area

Physical

Size: 81.3 × 81.3 × 41.3 mm
Use: Indoors only; 0°C to 50°C, 0 to 85% humidity
Mounting: Desk, 3M adhesive or screws; bracket pre-fitted

Where eufy’s documents disagree, we follow the most recent one, and where eufy hasn’t confirmed a pairing we mark it not compatible until it does.

The Indoor Siren E20 sounds when your eufy system tells it to; it doesn’t prevent anything, and sensors can miss or misreport activity.

Product images are official eufy images. Illustrations are labelled.

Our own 12-month warranty applies, not a manufacturer warranty. Nothing here limits your rights under Australian Consumer Law.

CamGuard Australia is an independent importer and reseller, not an official or authorised supplier, distributor or representative of eufy, Anker Innovations or their affiliates.

Details believed accurate at time of listing.

CamGuard Australia · ABN 62 385 894 763 · Townsville, Queensland

CamGuard Australiaeufy Indoor Siren E20 · T90R0121

Townsville alert board · siren ready

The house just
scrambled everything

A 110 dB indoor siren for the moment a polite phone notification has clearly failed to move the household.

Brand New · factory sealed · full retail packaging

eufy Indoor Siren E20 · T90R0121

The E20 brings a loud indoor alert, an alarm light and backup power to a compatible HomeBase system.

110 dB at 10 cmAlarm lightUp to 48 hr backupHomeBase requiredNo required subscription

We do our best to dispatch the same day; same-day to 1 business day is typical. During busy periods it can extend.

ALERT BOARD · 110 dB SIREN · HOMEBASE REQUIRED ·

Runway 110 · level selector

Four alert levels

Mute, 60, 85 and 110 dB are controlled in the app. High is measured at 10 cm and ships as the default.

0MUTE · library airspace

60LOW · 60 dB

85MED · everyone heard it

110HIGH · 110 dB

Control tower · hardware feed

A dedicated alert appliance, not a detector

ALARM LIGHT · ARMED

Indoor Siren E20
T90R0121

eufy Indoor Siren E20 compatible hub feature

Hub link

Sub-1G to a compatible HomeBase, rated up to 200 m in open area. Check range at your mounting point.

eufy Indoor Siren E20 alarm and power feature

Light + sound

An audible and visible alert for the household.

Indoor mount

Place near mains power. Indoor use only.

Boarding gate · HomeBase check

A compatible HomeBase is required

This siren is an accessory. It detects nothing itself and cannot pair as a standalone alarm.

Scan your HomeBase boarding pass

HomeBase MiniSupported on v4.0.5.2 or later.

HomeBase 2 after 2021S280 on v3.4.1.2 or later; older units are not listed.

HomeBase 3S380 on v3.7.2.6 or later; sold separately.

Professional S1Supported on v4.1.4.3 or later.

Router / cameraNot a substitute, regardless of confidence.

Original HomeBaseNot on the boarding list.

HUB CHECK REQUIRED

Blackout operations · cyclonic honesty

When the mains taps out, the siren keeps its hi-vis on

UP TO
48 HR

19:42 · MAINS LOST

Internal rechargeable 800 mAh cell takes over.

19:43 · HOUSEHOLD

The siren uses its internal backup cell during a mains outage.

RESTORATION

When mains returns, the backup cell recharges itself. It is outage cover, not permission to turn the siren permanently cordless.

Scramble chain · who does what

Sensors spot it. HomeBase decides. Siren removes all ambiguity.

01 · Detection
Compatible sensors, cameras or panic buttons report an event.

02 · Command
The HomeBase applies the automation you configured.

03 · Response
The E20 flashes and sounds at the chosen level.

04 · Neighbourhood
Test the alarm at a considerate time.

Interactive Townsville local knowledge

Authorise one silent flypast and one tiny page rattle

Clear fictional aircraft across the board

Townsville scene: this silent airfield flypast is fictional and unaffiliated. The page itself makes no sound.

Preflight card · do not laminate over these bits

The limitations, in control-tower English

Open aircraft-adjacent operating card

Model
T90R0121

Maximum
110 dB at 10 cm

Backup
Up to 48 hours

Cell
800 mAh internal, not user-replaceable

Radio
Sub-1G to hub

Open-area range
Up to 200 m

Environment
Indoor use

Subscription
Not required for local alarm function

Ground crew · exact sealed-box loadout

The sealed carton contains the siren and listed accessories. A compatible HomeBase is sold separately.

The factory-sealed E20 carton has one siren plus six support groups.

Included · Indoor Siren E20 T90R0121Brand New, factory sealed, in full original retail packaging. The product stays silent on this page; the real unit is rated up to 110 dB at 10 cm.

PWRUSB power cableloaded

AUPower adapterloaded

3M3M adhesive setloaded

BRKTPreinstalled mounting bracketloaded

FIXScrew setloaded

QSGPrinted Quick Start Guideloaded

Condition check: Brand New, factory sealed, full original retail packaging, not renewed, open-box or new-no-box.

Power check: mains power is the normal route; the internal 800 mAh cell is outage backup rated up to 48 hours, not a reason to install it permanently cordless.

Tower questions · final approach

Clearances before mounting

Can I use it without a HomeBase?

No. A compatible eufy HomeBase is mandatory and not included.

Does it need Wi-Fi itself?

It communicates with the HomeBase over Sub-1G rather than joining Wi-Fi directly. The wider eufy system and app still rely on the hub’s setup.

Does it keep working in a blackout?

eufy rates the internal rechargeable backup cell for up to 48 hours. Treat that as outage cover, not a reason to leave mains disconnected.

Will the page make a noise?

No. The page itself is silent; the real siren is rated at up to 110 dB at 10 cm.

What comes in the sealed box?

Indoor Siren E20, USB power cable, power adapter, 3M adhesive set, preinstalled mounting bracket, screw set and printed Quick Start Guide. A HomeBase is required and not included.