Optima RF Viper

Current Consumption 10 Micro Amps Battery Type 9V PP3 Alkaline Battery Life 6 months approx. RF Frequency 433.92 Mhz RF Range 100 Metres free air

 Dimensions H 190mm x W 36mm x D 24mm 

Certification I-ETS 300 - 220.

Adjustable sensitivity and "double knock" option make this device suitable for large patio glass doors etc.