Features: 1.Wireless Remote Control: The copy remote control realizes the dual control function with the wireless remote control switch, which is truly free of wiring. 2.Strong Confidentiality: The code will be automatically changed after each transmission, others cannot use the code detector to obtain the address code. 3.Large Coding Capacity: The number of address codes is more than 100,000 groups, and the probability of using repeated codes is extremely small. 4.Easy to Install: Comes with double sided stickers, can be attached to the bedside, bookcase, doorway, corridor, etc. 5.Independent Bottom Case: Screw free independent bottom case on the back, more convenient to change the battery. 6.Wide Applications: Suitable for pairing and duplication of remote controls for electric door, retractable door, garage door, motor control, curtain control, LED lights, car and motorcycle, industrial equipment, etc. specification:Item Type: Wireless Copy Remote Control Material: ABS Number of Keys: Single key Remote Control Distance: Approx. 50m/164ft (open space without interference, depending on the specific environment) Operating Frequency: 433MHz Encoding Format: Learning code (EV1527 or compatible chip) Remote Control Battery: 6 x CR2016 (built in) PackageList: 3 x Wireless Copy Remote Control 3 x Double Sided Stickers