Receive (RX) + transmit (TX) signals as one, suitable for multiple devices. screen display Eight devices can be displayed at the same time. Upgrade the bluetooth audio, play mobile phone music wirelessly (requires audio with 3.5mm audio interface). Using Bluetooth 5.0 chip, low power consumption, high speed, stable signal transmission, and smoother listening to . Support high-fidelity encoding technology, high sound quality and low delay, keep more details of music, and enjoy CD-level sound quality. Bluetooth solution: 5.0 , A2DP, , AVRCP Power supply interface: Type-C power supply port 5V Output interface: 3.5mm audio Frequency: 2.4GHz-2.48GHz Charging voltage: DC 5V Battery: 300 Working time: about 6 hours Bluetooth receiving function: connect 1 mobile phone Bluetooth transmitter function: connect 1 pair of bluetooth earphones Screen display: can display the names of 8 devices to be paired (transmitting) / can display the name of the paired mobile phone (connecting receive) Product size: 68x30x11mm Colour:black Material:ABS Package Contents: 1 x Host 1 x Audio Cable 1 x Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.