WDS-051-F V2 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.

(Working for model: T420-V2, T40-V2, S260-F, S460, WS250, WS420, W230-V2, G212-V2) 

Specifications: 
Power Supply DC 3V (CR2032 Lithium Battery x 1pc) 
Alarm Current ≤15mA 
Transmitting Distance ≤40m (in open area) 
Radio Frequency FSK 434MHz
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)