433Mhz Universal Wireless Remote Control Switch DC12V 4CH relay Receiver Module and 1pcs4 channel RF Remote 433 Mhz Transmitter Order Package Include:(3order model can be chosen) Order Model 1: 1 Rc and 1 DC1202 Details: Receiver Switch Module (KR1202): 1 Piece with Plastic Shell (KR1202 can support 25 Pieces Remote Control at most) Remote Control: 1Pieceswith Battery Note: The package Included different products because you choose a different package Order Model 2: 1 Piece Control Details: Remote Control: 1Piecewith Battery Order Model 3: 1 Piece DC 1202 Details: Receiver Switch Module (KR1202): 1 Piece with Plastic Shell (KR1202can support 25 Pieces Remote Control at most) SPECIFICATION1. Working Voltage: DC12V 2. Quiescent Current: 5mA 3. Working Frequency: 433Mhz 4. Receiving Sensitivity: -104dBm 5. Function option: Momentary/Toggle 6. Modulation Mode: ASK 7. Matching Mode: Intelligent Learning code 8. Output Mode: Dry contact /Voltage output 9. Shell: Yes 10. Working temperature: -30~+80 11. PCB dimension: 68.2x48.2(mm) Operation instructions: On this product details page there is a video (demo to use), but you have to use the computer to see it, you can not see it using your phone. Watch a demo video at YOUTUBE: