brand new and high quality Features: (TX transmission mode)This product is in transmit mode and can be used with a TV to wirelessly forward the sound to a Bluetooth-compatible device (Bluetooth-compatible headset) or Bluetooth-compatible speaker. (RX receiving mode) In the receiving mode, this product can transfer Bluetooth-compatible music on mobile phones, computers, and PADs to equipment with AUX/SPDIF input interfaces through the Bluetooth-compatible receiving function of this product. (Support function)Support voice frequency high definition decoding technology, support optical interface and 3.5mm AUX interface transmission, provide high-fidelity stereo sound quality. (Enjoy car Bluetooth-compatible music)Insert TR68 into the car's AUX interface, and after successful debugging, you can enjoy the car's Bluetooth-compatible hands-free calls and listening to music, and add color to travel. Specifications: Bluetooth-compatible protocol support: RX: A2DP AVRCP HFP TX: A2DP Transmission distance: 10M (open place) Battery standard: 300MA Working hours: RX about 12H TX about 10H Charging time: about 2H Charging voltage: for DC 5V Input/output connection mode: SPDIF, 3.5MM stereo interface CODEC: TX: aptX Low Latency, aptX, SBC RX: aptX Low Latency, aptX, SBC, ACC Material: ABS Size: app.12.5*10.5*4.5 for cm/5x4.2x2.25in Color: Black Quantity: 1pc Packing list: Optical fiber Bluetooth-compatible transceiver x1 Product manual x1Optical fiber x1 USB charging cable x1 3.5MM cable x1 RCA cable x1