LCD Display Co Alarm (BRJ-907LCD)

1) Power Supply: 3*1.5V AA batteries
2) Sensor: Electrochemical CO sensor
3)Alarm Style: Per EN50291
4) Sensitivity/Alarm Time:
Within 60~90 minutes @ 50ppm CO concentration;
Within 10~40 minutes @ 100ppm CO concentration;
Within 3 minutes @ 300ppm CO concentration
5) LCD Displayer(optional): 3 digits LCD displayer
6) Audibility: 85dB ( at 1m distance ), Frequency 3± 0.5KHZ
7) Led Indication /Sound Pattern:
Standby: Green Led flashes once every 30 seconds
Alarm: Red Led quickly flashes 4 times with unit chirping every 5 seconds, then repeat,
8) Low-bat Indicator:
Chirp every 30s as battery lower than 3.3V with green LED flashing and Lb on LCD
9) Malfunction Indicator: Chirp every 30s with green LED out and Err on LCD
10) Power consumption: 0.3mW
11) Sensor Life: 3 years
12) Operation ambient: 0 ~ 40, 20% ~ 90%RH
13) Mounting: Wall/Ceiling mounting
14) Dimension 100mm*40mm, Weight: 0.2kg