Brand:UnbrandedCountry/Region of Manufacture:HKMPN:Does not applyType:Battery PoweredHello! Welcome to our store!Quality is the first with best service. customers all are our friends.Fashion design，100% Brand New，high quality!Feature:1. Unit Size:Φ107X44mm2. Working Current: 1-Static Current: ≤10μA 2-Alarm Current: ≤12mA4.Operation Voltage: DC 9V Battery5. Alarm Sound: ≥85dB(3m)6. Ambient Temperature: -10°C∼+60°C7. Ambient Humidity: ≤95%RH8. Sensor: Optical9. Low Battery Alert Remain: 7-15 daysWhat You Get:1* 433Mhz wireless smoke alarm