1,Self-learning remote control 2, Work with fixed code remote, like PT2240, HT600, EV1527, SMC526 etc. 3 ... , More compatible Product Appearance : ItemRF transmitter with four keys (remote controller)Coding ModeFixed code FrequencyFixed (customized 315MHz ... and break remote .2,RF transmitterDevelop all kinds of PCB with different function .For home /car alarm ,such asASK modulate ...