... stability, SMT components, SAW (sound wave resonator);Optional for encoding IC;Technical ParameterFrequency Fixed:315Mhz/ 433Mhz/ 868Mhz/ ... temperature -50°C~+80°CUse range Home alarm, car alarms, industrial control, motorcycle alarm system, car alarm system, auto gate, motor and other security ... copy remote.Attention: during the learning, please make two remotes as close as possible, press the button ...