厦门领成通讯科技有限公司

WDS-051-F Wireless door magnetic sensor works well with any door, window or opening. When main unit and magnetic parts separated, it will auto transmit an alarm signal.

Specifications 
Power Supply DC 3V (CR2032 Lithium Battery x 1pc) 
Alarm Current ≤15mA 
Transmitting Distance ≤40m (in open area) 
Radio Frequency FSK 433.92MHz
Housing Material Metal+ABS plastic 
Operating Condition Temperature: -10°C~+55°C 
  Relative Humidity: ≤80% (non-condensing) 
Dimensions (LxWxH) 65 x 14 x 13.5mm (Magnetic parts)
Dimensions (LxWxH)72 x 37 x 15.5mm (Transmiter parts)