Specifications : Frequency : 433 -LRB- 433.92 -RRB- MHz Rated Voltage : 12V Battery : 12V 23A Size : 54 x 36 x 14 mm Weight : 30g Note : This far can not copy HCS rolling code, if you fail in copying with prudish operation, you might have to check whether your device has a chip like this. HCS encryption chip and otherwise encryption chip can not be. How to : Because the fob has code when it was produced, so you need to reset it before copying. : Hold buttons A and B down simultaneously, once the LED is flashing continuously, release both buttons to skilled the reset. -LRB- If your far has n't have button A or B, just the plaything two buttons -RRB- Copy : Hold down the button on the groundbreaking far you want to copy while simultaneously pressing and holding which button you want to program on the modern fob -LRB- A, B, C, D etc. -RRB-. -LRB- Both your groundbreaking far and modern far 's head should short to each otherwise -RRB- The process will be with the fob LED flashes. : If you reset the code that you had copied and want to recover, press buttons C and D -LRB- or the seat two buttons -RRB- until LED leavened flashing. Notice : If done correctly, can directly. If not, or independent button not, please turn to sportsmanlike and copy again, notice the change of leavened during operation. If problems still after attempting various times, check the chip and frequency of groundbreaking far curb again, and contact us. Package : 4 x far Control Key Fob .