This transmitter can only be paired with ASIN: B09FPHWNHY and ASIN: B09QKHKPCM to achieve the function of one receiver with multiple transmitters, with a maximum of 8 transmitters being paired. The pairing process is to first press and hold the Pairing Button hole at the bottom of the receiver with a card pin for 5-8 seconds, wait for the word "Ready to Pair" to appear in the of the TV screen. Then press and hold the button on the transmitter for about 5 seconds, wait for the light in the middle of the transmitter to start flashing, and then release it to let it pair automatically. After successful pairing, you can freely switch between multiple transmitters.