D4 Duplicate fixed code & rolling code(Even duplicate most brand remote ,433mhz,4 button ,waterproof) Support fixed code & rolling code: (Rolling code brands: BFT Mitto 2/4, FAAC 433M, Motorline, Beninica to go, Key, DEA, Doorhan, PECCININ, Nice flors 2/4, Nice smillo, GBD, Cenurion Nova,Hormann Eco star, V2, ECA, Fadini.) Single-button copy: (1) Press and hold the button of the remote control to be copied. The LED flashes twice and then goes out. At this time, the button enters the learning state. (2) Bring the original remote control close to the copy remote control, press and hold the button of the original remote control, the LED of the copy remote control flashes 3 times and then turns on, which means that the code has been successfully copied. Copying four keys in a row: (1) Press and hold the first button of the copy remote control, the LED flashes twice and then turns off, and the button enters the learning state. Hold the button and short-press the second button three times, the LED flashes three times. Enter the four-key copy mode. (2) Bring the original remote control close to the copy remote control, press and hold the button of the original remote control, the LED of the copy remote control flashes 3 times and then turns off, which means that the current code has been successfully copied. After the four keys are successfully copied in a row, the LED will turn on. Clear code: Press the first and second buttons of the copy remote control at the same time, the LED flashes 3 times. Press one button 3 times in a row, keep the other button pressed, the LED flashes continuously, and all information is cleared. Colour:White & Black Material:plastic Package Contents: 2 x Remote Control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.