Working method: copy type Working voltage: DC 12V Working current: 14mA Working environment: -15-+75 Application: for electric door remote control, retractable door remote control, garage door remote control, motor control remote control, curtain control remote control, car and motorcycle remote control, etc. Working frequency: 433MHz Remote control distance: 100m (in open environment) Operation method: 1. Code pairing (learning) Place the your remote control and the copy remote control as close as possible, first press a button of the your remote control, and immediately after the indicator light turns on, press and hold a button of the self-copy remote control for about three seconds, the LED will flash 3 times and then quickly Flashing, it means that the address code of the your remote control button has been learned successfully. The other keys are operated in the same way for learning. 2. Clear code Press the unlock button and the lock button at the same time for 2 seconds, the LED light starts to flash 3 times. At this time, keep the lock button pressed, and release the unlock button. Press the unlock button three or four times within 5 seconds, and the indicator light flashes quickly. The code has been cleared. Precautions: 1. Before using our remote control duplicator to copy, first clear the existing code of your exisiting remote control. 2. The self-learing remote control duplicator cannot copy rolling codes, such as HCS301. Each remote control is shipped with 1 x 27A battery Due to different factory batches, the product words are different, and the product accessories have slight differences in color and appearance, but it does not affect normal use Colour:Photo Color Material:Metal + Plastic Package Contents: 5 x 433 Metal Four-button Garage Door Rolling Code Copy 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.