【The Signal Is Stable】The remote control switch adopts wireless radio frequency technology, the operating frequency is 433MHz, so it can remotely control very long distances, the maximum distance is 50m without interference, the signalcan penetrate walls, door, floor, it is very stable. 【Quality】The RF wireless remote control switch is made of premium ABS and metal, the equipped modules have superior and stable performance, easy to use, high reliability, it is very durable. 【Function】Clear code steps - press the AB key at the same time, then the A key does not let go, press the B key three times in a row, the indicator light flashes continuously, indicating that the code clearis successful, and the next step.is to prepare copying.When copying begins, press a button on the original remote control and a button on the duplicator (such as button A) at the same time, and the indicator light flashes several times to indicate success. 【One to One Copy】Press the buttons of both at the same time (press the copy remote control with one hand, press the original remote control with the other hand), when the indicator light on the copy remote control isalways on, it means code matching for garage remote control. 【Widely Used】This 868MHz universal gate remote control is suitable for electric vehicle remote control, smart home remote control, electric door remote control, garage door remote control, learning code remote control andto the lighting remote control, etc. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-dadangjia