... distance: 8 ~ 12m Transmitting distance: 3 ~ 10km Emission current: 500mA Wireless Detector Alarm, 3-10km Transmitting Distance WB-200BTIFeature:1. Far ... alarming, a kind of deterrence on the spot.3. Support wireless remote control emergency alarm.4. Strong anti-jamming ability, low ... ~ 50°CFor more details, pls feel free to contact us! Wireless Detector Alarm, 3-10km Transmitting Distance WB-200BTI