This magnetic wireless door sensor is made of , which can withstand use. Features the ABS material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. Features -Color: White -Material: ABS -Size: 8.20X4.20X1.60cm/3.22X1.65X0.63in Note: random sign Battery type：2 x AA (not included) Stand by current：open:28.4uA close:28.1uA Trigger current：43mA Pairing current: 37mA Working time：4000 times Operating temperature：0 degree centigrade - 40 degree centigrade (32°F - 104°F) Operating Humidity：20% - 85% Storage Temperature：0 degree centigrade - 60 degree centigrade (32°F - 140°F) Storage Humidity：0% - 90% Wireless Type: 2.4GHz Protocol: 802. / Wifi distance: 45m - Get instant push notification to your phone when door sensor detect abnormal activity. - Easy to install with adhesive. You can glue it onto the window or door. - Suitable for home, office, apartment, hotel, warehouse, store, and etc. - Adopt premium quality ABS material for durable and lasting use. - workmanship, reasonable structure, professional and practical, can bring you convenience. Package list: 7 x door alarm