Main feature: Mcu processing adopted Automatically identify valve control Wireless transmitting digital signal Low power indication Automatic temperature compensation Smt adopted, anti-rfi & anti-emi Low power consumption, long battery life Adjustable detecting distance Pulse count optional Technology parameter: Operating voltage: 2*1.5v (2*aa battery) Standby current: less than 12ua Alarm current: less than 15ma Operating temp.: -10 to +50 degrees Installation mode: wall mounted Installation height: about 2m Detecting distance: 9-18m Detecting angle:110 degrees Transmitting freq.: 315mhz or 433mhz Sending distance: more than 200m( in the open area)dimension: dimension: 110*69.5*40mm Colour box or carton packing