Purchase Qty. Reference FOB Price
20-199 Pieces US$2.60
200-499 Pieces US$2.30
500+ Pieces US$2.20
Product Description
Door contact detector sensor for alarm systems Match with M2 (remind door not close ) 1. Very low power consumption. The battery can last for about 1-2 years. 2. Tamper alarm function and low power alert function. 3. Can be used as door sensor or panic button