Connection instructions: 1. Connect USB power cable to transmitter and signal source. 2. Connect USB power cable to receiver and display device. 3. Insert transmitter HDMI port into signal source HDMI output port. 4. Insert receiver HDMI port into display device HDMI input port. 5. Wait for 30-40 seconds for image to appear. Matching method: Long press pairing button on transmitter and receiver, then connect to power supply. Wait for green indicator light to turn on and release pairing button. Precautions: Connect power supply first, then HDMI interface. Use power supply if no signal appears on display device.