Features : Four buttons can be used to copy four different types of chips, that is, one remote can operate four different types of facilities. The frequency ranges: Only copy 433MHZ frequency remote control. Copying data is faster, it is not easy to lose code, and the distance is far. (It's especially important: the remote control on your hand must work properly and be the same frequency as our remote control) Used for remote control types: telescopic doors, sliding doors, swing doors, flap doors, rolling doors, garage doors, electric doors, curtains, wife sockets, LED lights, wireless doorbells, car fenders, anti-theft devices, motorcycles, electric cars, etc. Up to 100meter transmitting distance Material: ABS + electronic components Specification : Frequency: 433MHZ Colour: Black Size: 55*33*12 (mm) Clearing method: Press the "A" button and the "B" button at the same time, the LED indicator flashes three times. Release the pressed "B" button, the "A" button is not loose, click the released "B" button three times, LED indication light enters the fast flashing state. At this time, the memory data is completely cleared. After the data is cleared, the LED indicator is not lit no matter which button is pressed. Copy the method: One hand holds the original remote control, the other holds the remote control, and the two remotes are as close as possible. (ideally, the two remotes are placed on the desktop with the zero distance on the side.) Press the desired button. The LED indicator flashes rapidly after three flashes, and the copy is successful. The other buttons operate in the same way. Some remote controllers have a small transmitting power, and they should be back-to-back operated with the original remote control and the remote control. Some operating environments have interference, and should avoid the interference operation. If the copying is not good, copy it again after clearing the code. Include: 1 x Remote Control Duplicator(built-in button battery)