HF-S2
Hikfire HF-S2 Smoke Alarm, Support real-time smoke detection and send out sound and strobe signals, Alarm beep buzzer, sound level ≥ 85 dB@3m, Supports multiple types alarm: low voltage alarm, maze dirty alarm, Battery Powered: 3 years (AA× 2 alkaline battery), easy to replace, Support self-test function to verify whether the device is working properly, European EN-14604 certificate, I/O linkage.