Gas Leakage Detector Alarm With Rechargeable Battery

We offers gas leakage alarm detector with rechargeable battery.
backup battery: rechargeable, ordinary battery
working environment:
humidity: ≤97% rh
temperature: 0-60℃
dimensions: 163 x 87 x 40mm
working voltage: 220110230240v ac, backup 4.5v battery
additional function: can work with solenoid valve or manipulator or exhaust fan (optional)
networking: wired networking (no, nc)
wireless networking mode: 315433mhz (2262 or 1527)
alarm concentration:
coal gas: 0.1 to 0.5%
natural gas: 0.1 to 1%
lpg: 0.1 to 0.5%
automatic error-detecting function (the red and green lights shine alternatively)
static current: ≤40ma
alarm current: ≤150ma
static consumption: