The magnetic door alarm is convenient and practical, with excellent texture, and can serve you for a long time without being easily . The craftsmanship can serve you well without breaking easily. This is a very practical magnetic window alarm. Features -Color:White -Material:Plastic -Size:7.00X2.50X2.00cm/2.75X0.98X0.79in -Size:4.40X1.50X1.00cm/1.73X0.59X0.39in -Input voltage: DC3V LR03 -Static current: <=35uA -Alarm current: <=135mA -Low voltage: <=2.4V -WiFi: 802.11 /n -Magnetic control distance: <=20mm -Light range: 0~10000Lux -Operating temperature: - centigrade~+50 degree centigrade -Working humidity: Max 95%RH - When the alarm and magnetic strip are separated, the alarm will let alarm out immediately. - Once and are opened, the alarm is triggered immediately to protect the safety of the family. - Simple installation: No need for complex wiring, just paste with sticker to complete the installation. - Suitable for home, office, dormitory, hotel, store, jewelry cabinet, and etc. - Tough, durable, can be used repeatedly, very practical and excellent, very decorative and chic. Package list: 3 x set of sensor