1. Learning code receiver module 2. 4 channles output 3. Strong noise immunity Operation voltageDC 2.4-5.5VStandby current<1uAOperation frequency315MHz, 433MHzModulationSuper ... been producing wirless remote control, RF transmitter and receiver modules, wireless receiver control switch, wireless detectors(PIR Motion sensor, ... begin working with you! 433M Learning code receiver module with 4 channels