Wireless WiFi Smart Home Door Window Alarm Sensor - Anti?Theft Security System with Door/Window Sensor, Magnetic Sensor - Home Devices for Enhanced Security

Specification: Item Type: Door/Window Sensor Material: ABS Color: White Size: Approx. 76x31x20mm / 3.0x1.2x0.8in Weight: Approx.51g/1.8oz Battery: 1 x CR2 lithium battery(Built-in) Battery Capacity: 850 mAh Application: Check the status of the door/window opening and closing in real time, and the on-off record is clear at a glance. Package List:1 x Door/Window Sensor1 x Magnetic Strip1 x Sticker1 x Pin1 x English Manual Note:1. Please allow 1?2in error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.