high quality ABS outshell Wireless Smoke Detector, Ceiling mounted RF distance: 150m ( line of sight )

 Wireless Smoke Detector

SD-305W

Ceiling-mountedRF distance: 150m ( line of sight )Radio frequency: 433.92MHz±75KHz OpStandby current:  ≤10μALow voltage alertSelf-checking Dry battery:  9V / 200mAhOperating temperature: -10°C ~ +50°C

Humidity:?95%RHStandard:GB4715-1993,CE aprroval.

GSM Wireless Smoke detector