1. Learning code receiver module 2. 4 channles output 3. Strong noise immunity Operation voltageDC 2.4-5.5VStandby current<1uAOperation frequency315MHz, 433MHzModulationSuper ... )AntennaExternalPackageDIP, 7pin, (D0-D3, Vcc, GND, Key)Size35mm*20mm*6mmCertificationCE(R&TTE), FCC(Part 15.), RoHS Minew company is not only ... begin working with you! 433M Learning code receiver module with 4 channels