Other notes:
① The encrypted Bluetooth speaker or Bluetooth headset is not suitable for the adapter.
② The Bluetooth adapter is not suitable for scenes such as musical instruments, mixers, Bluetooth microphones, and studio recording equipment. High latency may occur.
③ The sound of some High-end headphones are not very loud, such as Sony, Bose. If you find the sound is low after connected, please turn it up.
④ Some other brand headphones(like Sennheiser), need the PIN code when pairing. Please note: for thses headphones, the Blueooth adapter cannot with it.
⑤ If you need to connect with the airpods, please do not pick up the airpods headset, you need to directly click the button on the back of the case until the charging box of the airpod is blinking white, and you can then connect it with the Bluetooth adapter in TX mode.