How to use:
Step 1: Connect 5V1A to the USB output power supply;
Step 2: Set the channel switch to CH3 or CH4 and the modulator switch to on; (if off, RF will not work);
Step 3: Connect RF and RF OUT;
Step 4: Connect the A/V input signal;
Step 5: Switch the TV to CH3 or CH4;
Please follow the above steps carefully.