Product Name: Tuya WiFi Smart Window Sensor with Automation Function (ES-400MC) Model NO.: ES-400MC Certification: DOT, CE, ISO, FCC, RoHS, CCC Usage: Door, Window Application: Home, Communication Electronic Products, Car/Motorcycle Type: Anti-Theft Alarm System: Intelligent System Signal Transmission: Radio Waves Detecting Distance: 100m Wireless Frequency: 868MHz or 433MHz Code: Learning Code Alarm Distance: <4cm Operating Voltage: DC12V Can Be Installed: Window or Door Alarm LED Indicator: Yes Low Voltage Indicator: Yes Product Dimension: 65