Remote control system lets you take control of your gadgets, car, home, and garage, Use for garage door, sliding door, gate, etc. Package Includes: 1 x 433MHZ Remote Control (built-in battery) Chip: SA901B main control chip Product Features (1) Working frequency: 433.92 MHz (special frequency can be customized according to customer requirements) (2) Power supply: DC3V (button battery 2032) power supply (included) (3) Standby current: less than 0.15uA (4) Good selectivity and stray radiation suppression ability (5) Good local vibration suppression ability (6) Temperature range: -20-70℃, it can work normally even in harsh environmental temperatures (7) Product size: 60x37.4x11.4 (mm) (including shell) (8) Product weight: 14.39g (including shell). Function Description (1) Copy code operation If the remote control has checked the code, the code must be cleared before the code can be checked. Code matching operation: press the single button of the copied remote control and the copy remote control at the same time, until the indicator of the copy remote control flashes from fast to steady on, you can release the two remote control buttons, and the code matching is successful. The other keys are also operated in sequence according to this method until all keys are copied. (2) Clear code operation Press and hold the lock and unlock buttons of the copy remote control at the same time until the indicator light flashes 3 times, and then short press the unlock button three times. The indicator light flashes continuously to indicate the success of the code clearing (the lock button is kept pressed during this process). (3) Recovery code operation Press and hold the mute and ring buttons of the copy remote control at the same time until the indicator light flashes quickly, you can restore the remote control code that was cleared before. 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.