Standalone Battery operated Smoke Detector System Sensor

Size 102.4 mm in diameter ×44mm depth (With base) Temperature Range -10°C to 55°C (14°F to 131°F) Humidity Range 5% to 93% relative humidity (RH), no condensation Working Voltage 3VDC (2 × AAA alkaline batteries) Battery Recommended brand -- BP, Energizer, Duracell, Panasonic 2 years under normal operating condition (The life may reduce depending on the operating condition) Audio Alarm ≥ 80dB at 3m • Warranty:- 1 Year