Feature: 1. WIDE APPLICABLE: This is a smart infrared detector, compact, convenient and well concealed. Alarm sensors can be installed on front doors or Window, garage doors, wine cabinets, safe deposit boxes, pet doors, etc. Used to detect moves and opens 2. UNIVERSAL AND COMPACT: Door alarm sensor needs to be used with the alarm host, with two built in codes. The 1527 code can be compatible with various alarm hosts and smart home gateways, with strong compatibility and small size 3. ACCURATE AND EASY USE: Door alarms requires no difficult installation tools, fast installation speed, low power, and long battery life. Avoid frequent replacement. With high performance, low power consumption, long standby time, accurate alarm, false alarm probability is very low 4. SECURITY PROTECTION: After the door sensor works, when someone opens the door, home safety alarms will automatically activate and send alarm signals to the alarm host, and immediately push notifications to you, so that you can receive alarm signals and protect your family members 5. EASY TO INSTALL WITH TWO CHARGING METHODS: WIFI smart motion sensor supports a variety of installation methods, such as flat and wall fixed. Indoor motion sensor alarms are powered by 2 x AAA batteries(included) or USB cable(not included) Specification: Item Type: Door Alarm Sensor Battery: 2 x LR03 1.5VAAA battery 700mAh Frequency: 433MHz Operating Temperature: -10~33℃ Storage Temperature: -20℃~60℃ Detection Distance: Approx. 2 ~ 8meter / 6.6 ~ 26.2ft Detection Angle: Horizontal 100°, vertical 30° This machine has two built in coding selector switches, KS code is compatible with the alarm host; 1527 code is compatible with all kinds of alarm host(GSM) and smart home gateway(you can select the code by flicking the box with a small screw or toothpick) . Package List: 1 x Infrared Detector1 x Support1 x Double Sided Tape2 x Battery4 x Accessories