Description: The door sensor supports 2.4G Hz WiFi connection, which has quick and stable transmission and more convenient use. The door sensor features high sensitivity, which can quickly push notification to you if the doors or windows are opened or invaded by an external object and you will know anomalies in your home immediately. Made of ABS, the door sensor is eco-friendly and lightweight to use. The length of door sensor is 9.3cm, width is 4cm and thickness is 2cm. The length of the small one is 9.3cm, width s 1.3cm and thickness is 2cm. The door sensor is suitable for being used in home, office and so on. Item Name: Door Sensor Material: ABS Battery: 2 x AAA Batteries 1.5V(Included) Standby Current: 5uA Protocol: IEEE 802.11b/g/n, Wireless Range: 50m Working Temperature: -10 Degrees Celsius-40 Degrees Celsius (14 Degrees Fahrenheit-104 Degrees Fahrenheit) Working Humidity: 20%-85% Storage Temperature: -10 Degrees Celsius-60 Degrees Celsius (14 Degrees Fahrenheit-140 Degrees Fahrenheit) Storage Humidity: 0%-90% Standby Time: 6-10 Months Wireless Type: 2.4GHz Certification: FCC, CE, ROHS Features: Mini, Sensitive, Stable Output Size Details: Door Sensor: 9.3cm x 4cm x 2cm/3.66" x 1.57" x 0.79" (Approx.) Small One: 9.3cm x 1.3cm x 2cm/3.66" x 0.51" x 0.79" (Approx.) Notes: Due to the light and the screen setting difference, the item's color may slightly differs from the pictures. Please allow slight dimension difference due to the manual measurement. Package Includes: 2 x Door Sensors 1 x User Manual