Features: brand new and high quality Bluetooth-compatible receiving function: connect 1 mobile -phone. Bluetooth-compatible transmitter function: connect 1 pair of bluetooth-compatible earphones. Transmit and receive support to read TF card and for play. Screen display: can display 8 device names to be paired (transmitting) / can display the paired mobile -phone name (receiving). Multi-function Bluetooth-compatible transmitter & receiver:In TX Mode: Transfer your music from a TV, CD player, laptop to a Bluetooth-compatible headset or stereo; In RX Mode: will transfer the music in your mobile -phone or computer to the audio, so that you can enjoy HIFI CD freely The sound quality. Bypass mode: cable connection between TV and Speaker, you no longer need to plug/unplug any wires,easily switch -it to other two mode. Specifications: Material:PC Size:Approx.11x9.2x3cm/4.33x3.62x1.18in Bluetooth-compatible Version: 5.0 EDR, A2DP, HSP, AVRCP Frequency: 2.4GHz-2.48GHz Charging Voltage: for DC 5V Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Bluetooth-compatible Adapter 1x RCA Audio Wire 1x Power Cable, 1x Optical Fiber Cable, 1x 3.5mm Audio Cable 1x Manual