1、Advanced Chip: BT 0 transmitter receiver with CSR8675 high end BT chip, aptx HD hifi lossless sound quality, aptx LI lag free simultaneous transmission. 2、NFC Function: Wireless adapter's NFC feature provides a simpler way to connect wirelessly, no need to search, just touch any NFC enabled device to quickly pair a BT connection. 3、TX Mode: BT 0 transmitter receiver supports dual streaming (TX mode) and the transmitter supports the simultaneous connection of two BT speakers or headsets (using the same CODEC). 4、Supported Formats: BT transmitter receiver adopts SPDIF, I2S sound input/output interface, freely switchable; supports SBC, apt X HD, apt X LL, apt X sound formats. 5、Stable Performance: BT 0 transmitter with BT 0 sound transmission, stable and reliable; built in 1000mAh lithium ion battery for long life. 1 x Sound Adapter (Battery Included)1 x Digital Optical Cable1 x 3.5mm Cable 1 x RCA Cable 1 x USB Charging Cable 1 x Manual  Item Type: BT Transmitter ReceiverMaterial: ABSModel: B22BT Chip: CSR8675 BT Version : BT V 5.0 Transmission Distance: >80m/ 262.5ftBT Protocol Support: RX: A2DP AVRCP TX: A2DPInput/Output Connection: SPDIE, 3.5mm SoundSound CODEC: aptx HD, aptx Low Latency , aptX, SBCOperating Time: RX>20H TX>22HBattery Type: 1000mAh Li ion Battery (Built in)