New-dual voltage smoke alarm

Photoelectric smoke detector;smoke sensor;smoke and fire alarm The detector is suitable for house, shop, hotel,restuarant,office building, school, bank, library, computer house and storehouse LS-828-9UA Main feature test by hand/auto-resetPIR photoelectric sensorIndependency type/LED alarmsingle side fiberglass PCBTechnical parameter Operating Voltage DC9V and AC 220V Audio Alarm 85 Db at 10 feet Temp Range 14°F( -10°C ) to147°F ( 60°C) Humidity Range ≤ 95%RH( 40±2°C ) Battery 9V battery back-up for at least 1 year Protection area 6 m high , 60 square metre Static Current ≤10μA Alarm Current ≤12mA