Working Frequency : 315 MHZ or 433 MHZ (optional)315/433MHz can be choose,If there is no requirement. wewill send 315 MHZ About Receiver: Model No.: KT-05A 1. Working voltage: AC85-250V;DC24-100V 2. Quiescent condition: Less than 8mA 3. Working temperature: -40 Degree +80 Degree 4. Receiver sensitivity: more than -105dBm 5. Working frequency: 315MHZ/433MHZ (other frequencies can be customized) 6. Output voltage: Input = Output 7. Max load current: 10A 8. Size: 60.5 x 50 x 25.5mm About Working way: Working way changed by jumper on pins Toggle: jumper doesn't connect any two pins. Relay: Press and hold -> On; Release -> Off. Momentary: jumper connects the pin 1 and pin 2. Relay: Press -> On; Press same button again -> Off Latched: jumper connects the pin 2 and pin3. Relay: Press -> On; Press other button -> Off. About Learning and clearing Method: Learning: Press learning button 4-6seconds, the indicator OFF, loosen finger, press any button of the remote transmitter, indicator flashes 5 times, meaning learning succeeds. Clearning: Hold press learning button about 8 seconds,,indicator from OFF to ON,then press remote ,Relay did not Respond ,it means clearning code successful. Frequency Distance: 10M-100M (please notice that is the ideal distance without any block and signal interfere , it would rise and fall about 10%-50% with the block and signal interference ). package included: A:1*receiver 1* transmitter ( included battery) B:1*receiver 2* transmitter ( included battery) C: 1*receiver 4* transmitter ( included battery) D:1*receiver E: 1* transmitter ( included battery)