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,330MHz,443.92MHz etc .Battery Model 27A Voltage12V MaterialABS Plastic +Silicon Rubber Remarkwe will produce PCB according to your requirementSize ...