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 sunroofs, Car/Motorbike alarms, etc. Code clearing operation: hold down the unlocking button and the button of the copy remote control at the same time- until the indicator light flashes quickly, and then press the unlocking button three time- to clear code (the button is held down all the time- during this process). Copy code operation: if the remote control code over code needs to clear code to code. Code operation: press the copied remote control and single button of the copy remote control at the same time- until the light of the copy remote control flashes from fast- to steady on, then release the two button of the remote control and code is successfully match. Specifications: Material: ABS, Metal Battery: 1x2032(Included) Working Method: Copy Electrical Parameters: Working Voltage-: 2.4-3V Transmit Power: +3-6dBm Working Temperature: -20 to 70 Type: 315Mhz/433Mhz Size: Approx. 60x37.7x11mm/2.36x1.47x0.43in Package Includes: 1x Transmitter note: (1) The battery voltage- should not exceed the operating voltage- ranges. (2) When copying the remote control, try to keep two remote control close to each- other; otherwise, copy exception may occur. (3) In the environment with large wireless interference, the remote control distance may be reduced. (4) Keep it out of reach of children. (5) Do not use it in humid environment, otherwise it may cause damage to the remote control.