Sonoff-C SenseGuard Zigbee Indoor Siren | SNZB-09P

Sonoff SenseGuard Zigbee Indoor Siren | SNZB-09P

The SONOFF SenseGuard Indoor Siren (SNZB-09P) is a Zigbee 3.0 siren with an alarm volume of up to 105 dB and a red circular warning light. Linked with door/window, motion or water leak sensors and cameras, it sounds an alarm automatically when something unusual happens.

It is powered over USB-C (5V/1A) and has a built-in 600 mAh backup battery that keeps it working during a power cut.

Color: White

Up to 105 dB Alarm: A loud alarm of up to 105 dB alerts everyone in the home and helps deter intruders. Four volume levels let you use it as a gentle notification or a full alarm.

Sound, Light or Both: Choose sound only, light only, or sound and light together. The red light ring makes alerts easy to notice, especially in low light.

10 Built-in Alarm Tones: Assign different tones to different sensors or events, so you can tell from the sound where an alert came from.

Backup Battery: The built-in 600 mAh lithium battery keeps the siren online during power outages, for more than 300 days in silent mode, and recharges automatically when USB power returns.

Who it's for / Works with: Homes, shops and garages building a Zigbee security system. SONOFF lists these Zigbee hubs: SONOFF ZBBridge-P, ZBBridge-U, NSPanel Pro and iHost (eWeLink app); Home Assistant via ZHA or Zigbee2MQTT with a SONOFF Dongle; and Aeotec Smart Home Hub V3 (SmartThings).

Good to know: A Zigbee hub is required. Indoor use only. Full ZHA support is not yet merged in Home Assistant, so some functions need SONOFF's script (the same applies to SmartThings).

Technical Specifications

📄 User manual: Download the official SONOFF SNZB-09P user manual (PDF)