... ~+80°CUse range Home alarm, car alarms, industrial control, motorcycle alarm system, car alarm system, auto gate, motor and other security ... at the same time for 2 seconds, the LED will flash and extinguish immediately, at this time ... . Now if you press any button, the LED will not flash immediately, that means the code ... from 280Mhz to 490Mhz. If the remote is with metal parts, then adjust 3Mhz lower to ...