*Installation test: independent test button
*Alarm detection: automatically adjust sensitivity
*Self check function: self-checking once every 24 hours
*Display mode: colorful ring lamp
*Networking mode: ZigBee, WiFi
*Ultra low power consumption: long battery standby
*Alarm content: over concentration alarm, low battery voltage alarm
*Alarm sound: >85dB
*Working voltage: DC3V, 1 * CR123A lithium battery
*Working current: ≤ 30 µ A monitoring, ≤ 100mA alarm
*Working environment: - 10℃ ～ 50℃，< 95%RH
*Dimensions: φ 55*49mm