Model Number: WL-ZSPCNPW-SK-01--004 Key Specifications/Special Features: 1. Wulian smart smoke detector can apply to ZigBee smart security systemPush notifications can be seen on app2. Work with smart sound Warner for local alarm while sending messages via app3. Supports tamper alarm4. Strong anti-interference ability with low false alarm rate ParameterName: Wulian smart smoke detectorCommunication mode: IEEE 802.15.4 (ZigBee/smart room) Power parameter: 3VDC Standby current:＜10μA Battery type: CR2 battery*1 Alarm current: 75mA Alarm decibel: 70dB at 3m Installation method: base-fixed Working temperature/humidity: -10 to +45℃/≤95%RH (non-condensing) Material and color: PC, white Dimensions (L*W): (L) 98 * (W) 43 (mm) Net weight: 84g Gross weight: 211g