Device profile · Specifications & compatibility
Eufy Indoor Siren E20
Eufy · Sirens · Model T90R0121
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- Eufy Indoor Siren E20 lists Sound Level: 110 dB; Home Assistant; Battery Life: 48 hours.
- Compare measurement distance and operating mode before comparing decibel values.
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- Recorded year
- 2026
- Recorded warranty
- 1 year
- Dimensions
- 81.3 x 81.3 x 41.3 mm
- Weight
- ?
The details that shape your choice
Eufy Indoor Siren E20 Quick Features
Start with these specifications, then check the full details and conditions below.
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From specification to decision
Eufy Indoor Siren E20: Capabilities And Limitations
Based on listed specifications, not hands-on testing. Manufacturer sources are linked where checked.
What it offers
A Home Assistant integration is listed, providing an integration path to verify for the exact model. Check the exact integration and firmware. A catalog integration label does not establish local control, official support or available entities. The community eufy-security-client integration (installed through HACS) lists this exact model (T90R0, Siren Sensor E20) with basic functionality.
View Home Assistant details →
What to consider
Matter is listed as unsupported; check another documented integration if Matter is essential to your setup.
View Matter details →Apple Home support is listed as unavailable; do not assume the device appears directly in Apple Home.
View Apple Home details →Solar charging is listed as unavailable; check the supported power or charging method.
View Solar Charging details →
Still needs verification
Confirm these details if they matter to your setup.
Questions About Eufy Indoor Siren E20
What is the sound level of Eufy Indoor Siren E20?
The stated alarm level is 110 dB. The source does not specify a measurement distance for the alarm level. Backup duration varies with usage. Compare measurement distance and operating mode before comparing decibel values.
Source: Eufy Indoor Siren E20 manufacturer product page · Checked 2026-10-04
View Sound Level specifications →What is the tamper capability of Eufy Indoor Siren E20?
Tamper: No. Verify the triggering condition and supported alert destination.
View Tamper specifications →Does Eufy Indoor Siren E20 support Matter?
No, according to the listed specifications. Verify the exact device type, firmware and features exposed in your chosen platform. Matter support is not proof of feature parity.
View Matter specifications →Does Eufy Indoor Siren E20 work with Home Assistant?
Yes, according to the listed specifications. Check the exact integration and firmware. A catalog integration label does not establish local control, official support or available entities. The community eufy-security-client integration (installed through HACS) lists this exact model (T90R0, Siren Sensor E20) with basic functionality.
View Home Assistant specifications →Does Eufy Indoor Siren E20 work with Apple Home?
No, according to the listed specifications. Check the model, firmware, exposed controls and any additional hardware requirements.
View Apple Home specifications →Explore the full picture
Eufy Indoor Siren E20 Specifications
Recorded catalog values. Expand notes for qualifications; unknown values are not treated as missing features.
2 of 27 fields matched to manufacturer documentation. Source checks apply only to the named model and stated scope. Other fields remain catalog data. How we verify specifications →
Sound4 fields
| Tones | Not recorded |
|---|---|
| Sound Level | 110 dBManufacturer sourceThe stated alarm level is 110 dB. Eufy Indoor Siren E20 manufacturer product page →
The source does not specify a measurement distance for the alarm level. Backup duration varies with usage. Document check only; not a hands-on test or verification of every regional or firmware variant. Details & conditionsFour volume settings selectable in the app: mute (0 dB), low (60 dB/10 cm), medium (85 dB/10 cm) and high (default 110 dB/10 cm). |
| Sound Duration | Not recorded |
| Voice Prompts | No |
Sensors2 fields
| Vibration | No |
|---|---|
| Tamper | No |
Connectivity7 fields
| 2.4 GHz Wi-Fi | HomeBase requiredDetails & conditionsSub-1GHz link between the siren and the HomeBase, which provides the WiFi connection. Works with HomeBase Mini, 2, 3 and Pro. |
|---|---|
| 5 GHz Wi-Fi | No |
| Bluetooth | No |
| Z Wave | No |
| Zigbee | No |
| Thread | No |
| Other | No |
Features2 fields
| Presence Simulation | No |
|---|---|
| Automations | YesDetails & conditionsTriggers from motion sensors, door/window sensors or panic buttons, and runs with eufy security modes and automations. |
Integrations6 fields
| Google Home | No |
|---|---|
| Alexa | NoDetails & conditionsThe siren is a HomeBase accessory: it sounds from eufy alarm events and is not published to Alexa as a device of its own. |
| Apple Home | No |
| SmartThings | No |
| Home Assistant | YesDetails & conditionsThe community eufy-security-client integration (installed through HACS) lists this exact model (T90R0, Siren Sensor E20) with basic functionality. |
| Matter | No |
Power4 fields
| Wired | YesDetails & conditionsPowered by a Type-C 5V/1A adapter with a 6.5 ft cable, plus a built-in rechargeable battery as backup. |
|---|---|
| Battery Type | Built-in Li, 800mAh, 3.7V |
| Battery Life | 48 hoursManufacturer sourceBattery backup is rated for up to 48 hours. Eufy Indoor Siren E20 manufacturer product page →
The source does not specify a measurement distance for the alarm level. Backup duration varies with usage. Document check only; not a hands-on test or verification of every regional or firmware variant. Details & conditionsThe built-in battery provides up to 48 hours of backup during a power outage. |
| Solar Charging | No |
Light2 fields
| Light Type | No |
|---|---|
| Light Level | No |
How this device compares
Eufy Indoor Siren E20 vs Other Similar Models
Statistical context from 8 sirens in this catalog. These figures describe our recorded data, not independent measurements.
Recorded feature coverage
Wired: 7 of 8 known answers are Yes
Power: 88% among explicit Yes/No answers; 0 of 8 devices have no resolved answer. Check the specifications for this model’s conditions.
Recorded feature coverage
Automations: 8 of 8 known answers are Yes
Features: 100% among explicit Yes/No answers; 0 of 8 devices have no resolved answer. Check the specifications for this model’s conditions.
Recorded feature coverage
Home Assistant: 6 of 6 known answers are Yes
Integrations: 100% among explicit Yes/No answers; 2 of 8 devices have no resolved answer. Check the specifications for this model’s conditions.
Brand representation in this directory
2 of 8 models are from Eufy
Counts sirens listed here, not sales or market share. Catalog inclusion does not imply a recommendation.
Side-by-side specification comparison
Compare Eufy Indoor Siren E20 vs Similar Sirens
See how Eufy Indoor Siren E20 stacks up against other sirens in this catalog. Compare specifications, compatibility and pricing.
Catalog specifications have not all been independently checked against manufacturer sources. Read our data and evidence methodology.