Features:* Adopts MCU Auto-Processing Technology.* Low-battery warning.* Auto-Reset after trigger.* Infrared Photoelectronic Sensor.* Sound & Flash Alarm & LED indicating Alarm.* SMT manufacture technology， reliable stability.* Dust-proof， Mothproof and Anti White lightinterference.Spcifications:Power Supply: 9V battery(one 6F22)(The battery not included)Static Current: <10uAAlarm Current: <35mASensitive Level: 2.06%/ft±1.3Alarm Indication: LED flashes in RedAlarm Sound: 85dB/3mTransmitting Distance: 200 meters(Open)Temperature: -10°C-50°CRelative Humidity: <=95%RHExecution Standard: GB4715-2005， En14604， UI217Installation Height: <6mItem Size: Approx.10.6*5.1*10.6cm/4.17*2.0*4.17inItem Weight: Approx.108g/3.76ozPackage Size: Approx.11.1*6.5*11.0cm/4.37*2.56*4.37inPackdge Weight: Approx.145g/5.11ozPackage List:1 * Smoke Detector1 * Accessory Bag1 * User Manual