Features: The device offers reliable transmission distance and flexible functionality with stable signal performance. Recovery Code Operation: Press and hold the mute and ringing button of the copy remote control simultaneously until the indicator light flashes quickly, then the previously cleared remote control code can be recovered. Code Clearing Operation: Hold down the unlock and lock keys of the copy remote control at the same time until the indicator light flashes quickly, then press the unlock key three times to clear the code (the unlock key must remain pressed throughout this process). Equipped with SA901B main control chip, supports online programming and can be rewritten repeatedly. Built-in EEPROM allows copying of other common frequency remote controls and code learning at any time. Easy to use and fast, suitable for car remote control, light control, smart home remote control, and other applications. Code Operation: If the remote control exceeds the code limit, the code must be cleared before new code can be matched. Press the copied remote control and the corresponding button of the copy remote control simultaneously until the light on the copy remote control changes from fast flashing to steady on. Release both buttons to complete the successful code match. Specifications: Material: ABS, Metal Battery: DC3V 2032 Battery (Included) Working Temperature: -20 to 70 Frequency: 315MHz / 433MHz Size: Approx. 66x35x15mm / 2.60x1.38x0.59in (Including Cover) Note: (1) The battery voltage should not exceed the operating voltage range. (2) When copying the remote control, keep both remotes close to each other; otherwise, copy errors may occur. (3) In environments with significant wireless interference, the remote control range may be reduced. (4) Keep out of reach of children. (5) Avoid using in humid environments as it may damage the remote control. Package Includes: 1x Remote Control