Features: 1Log Memory: Records the opening closing of your door for 7 days, letting you view any odd entries or exits in the past week, displaying time records intuitively. 2Low Battery Alert: Sends notifications to your app if the battery power is low, prompting you to replace the battery in time, ensuring continuous operation. 3Door Alarm Reminder: Customize your app to receive door opening closing reminders, ensuring you are not disturbed by frequent notifications. 4Home Security Guard: Helps you stay informed about the situation at home, especially when kids and pets are present and also guards your property making it safe. 5Easy Installation: Equipped with adhesive tape at the back, the door and window sensor can be stuck wherever you need. 6Shared Control: User friendly app allows sharing your devices with your family for joint monitoring of the connected devices. Specification: Item Type: Door Window Sensor DetectorMaterial: ABSWeight: Approx. 30g / 1.1ozWireless Connect: For ZigBeeOperating Temperature: -10C-+50CSensing Distance: 205mmBattery: CR2032 button battery 50mAh (included) Package List: 1 x Sensor1 x Receiver2 x Fixing Adhesive Tape1 x Manual