Product parameters:Bluetooth version: V5.0 low latency.Bluetooth chip: 8675.Frequency range 2.402GHz-2.480GHz.Receiver mode working time: unlimited time (plug and play).Transmitter mode working time: unlimited time (plug and play).Communication distance: RX: 10M, TX: 10M.Bluetooth protocol: A2DP, AVRCP.Codec method: , SBC.Power supply mode: Type-C interface.Working temperature: -10C-55C.Product net weight: 88g.Product size: 138mm*100mm*240mm.Bluetooth protocol: AZDP. AVRCP (can be connected to Bluetooth speakers or headphones that support the AZDP protocol to form a wireless audio transmission network, which can be used on TVs, CDs, home theaters and other equipment; it can also be connected to mobile phones/computers to play music ).Output: optical input, optical output, AUX input, AUX output.Charging interface: Type-C PD.One with two functions (transmitter mode) support (one transmitter is connected to two Bluetooth speakers or headphones at the same time, and one CODEC is used at the same time).Multi-point connection, one-to-two function (receiver mode): support (connect two mobile phones) supported Bluetooth headsets, Bluetooth receivers, Bluetooth speakers, etc.Device key 0000.CODEC TX: ,SBC;RX: SBC;Launch mode operation:1. Connect the Bluetooth adapter to the power supply.2. Press and hold the power button for 3S.3. Press the M button to switch to Tx mode, double-click the Bluetooth adapter A/B button to switch pairing mode and open the headset/speaker Bluetooth pairing mode after the connection is successful.4. Double-click the A/B button again and then turn on the second headset/speaker to connect to the Bluetooth pairing mode.5. At this time, the TX interface of the Bluetooth adapter shows that the number of connections is 2, indicating that both devices are successfully connected and support synchronous music playback.Receive mode operation:1. Connect the Bluetooth adapter to the power supply.2. Press and hold the power button for 3S.3. The Bluetooth adapter Bluetooth is disconnected. After pairing the first mobile phone, then turn on the Bluetooth of the second mobile phone. The adapter is powered off.4. Turn on the Bluetooth function of the first and second mobile phones at the same time, and then turn on the Bluetooth adapter. At this time, the adapter will automatically connect back to the paired Bluetooth of the two mobile phones. The Rx interface shows that the number of connections is 2, indicating that the two mobile phones are successfully connected.