Features: Quality material, durable in use, stable performance. The device has decent transmission distance and is quite flexible in functionality, signal stability. Widely used in vehicle central locking system, garage door, electronic gate, electrical appliances, home automation, lights, car sunroof, car/motorcycle alarm, etc. Code clearing: hold down the unlock button and the flash button on the copier remote at the same time - until the indicator light flashes quickly, then press the unlock button three times - to clear the code (the flash button is held down all the time - during this process). Copy code operation: if the remote control code over the code needs to clear code to code. Code operation: press the copied remote control and the single button of the copying remote control at the same time - until the light of the copying remote control flashes from fast to solid on, then release the two buttons of the remote control and the code successfully match. Specifications: Material: ABS, metal Battery: 1x2032 (included) Working method: Copy Electrical parameters: Working voltage-: 2.4-3V Power: +3-6dBm Working temperature: -20 to 70 Type: 315Mhz/433Mhz Size: Approx. 60x37.7x11mm/2.36x1.47x0.43in Note: (1) The battery voltage should not exceed the operating voltage ranges. (2) When copying the remote control, try to keep two remote controls close to each other; otherwise, copy exceptions may occur. (3) In an environment with large wireless interference, the distance of the remote control may be reduced. (4) Keep it out of the reach of children. (5) Do not use it in a humid environment, otherwise it may damage the remote control. Package includes: 1x transmitter