Copying: The corresponding button(you can decide which) of old remote and the our remote control is both pressed,during which the light quickly flashes twice,and slowly flashes 3 times then continuously light,then the two buttons is copied. The following 3 buttons copying is the same. Multi-functional and multi-variable, personalized and user-friendly simple design and fast to use. This smart copy remote control is suitable for electric door remote control, telescopic door remote control, garage door remote control. Clearing method: When the top two buttons are pressed at the same time,the LED indicator flashes 3 times and then releases the right hand (do not release the left hand). Press the right button continuously for three consecutive times with the right hand,and the indicator light flashes. Then the press any button the light still off.The clear function is completed. Chips that can be copied: PT2262,PT2240, PT2264, PT2260,PT2242,SC2262, SC2260, EV1527,P527,HT600,HT640,HT12D,HT12F,HT12E,SC5262 etc.