ZOWEETEK Wireless Lavalier Microphone Dual Channel Features: 1.The RX can transmit the audio to the TX1/TX2 while recording the TX1/TX2 voice, and the two TXs can also hear the sound in sync with each other. 2.Bluetooth 5.1 with the latest LC3 codec, providing low-latency and high-quality sound performance. 3.48K sampling rate with noise reduction. 4.Extremely fast pairing, fast and stable connection. 5.Vlog recording video with background sound mixed.Support monitoring function while recording,Monitoring via the 3.5mm TRS headphone jack. 6.Support Built-in/External Mic. 7.The included 3.5mm TRRS phone cable and 3.5mm TRS camera cable make this microphone suitable for a wide range of devices with a 3.5mm interface such as: smartphone, laptop, DSLR, tablet, camcorder and recorder. 8.Receiving and transmitting two-way, three-way voice inter communication, can easily complete various audio and video application scenarios such as TikTok connected microphone, sing and soon. Wireless Lavalier Microphone TX-RX Pairing method instructions: 1.TX--When the machine is turned on , long press the mute button for 3s on the TX, the left blue light flashes quickly, and enter the pairing mode 2.RX--When the machine is turned on , long press the volume button for 3s on the RX, the left blue light flashes quickly, and enter the pairing mode. 3.After the pairing is successful, the blue light on the left side of 'TX'/'RX' will change from fast flashing to steady light, indicating that the pairing is successful. [The machine has been paired successfully at the factory, and the machine does not need to be paired again after receiving it ] If the machine is disconnected, follow the instructions below to pair it manually. Wireless Lavalier Microphone for Camera Note: 1.The transmission distance of the device facing away from it is only 40ft. 2.If you do not use it for a long time, please charge/discharge the product every 1 month. 3.When using with a camera, please adjust the camera volume/gain, the volume of the RX to the minimum to ensure that the microphone picks up the sound. 4.When any key of TX or RX is invalid, it can be easily reset with one key according to the instructions of the manual.