B28 Sound Connect Transmitter and Receiver BT 5.0 Wireless Dual Antenna HiFi Transmitter Sound Adapter Feature: 1. [Excellent Hardware Support] BT 5.0 sound transmission, CSR8675 high end BT chip, aptx HD HiIFi lossless sound quality, aptx LI synchronous transmission without delay. 2. [Support Dual Stream] Support dual stream (TX mode), that is, the transmitter supports connecting two BT speakers or headphones at the same time (using the same CODEC). 3. [The Interface Can Be Switched Freely] The SPDIF and I2S sound input and output interfaces of the fiber optic sound adapter can be switched freely, reducing operational errors. 4. [Strong Compatibility] The adapter is compatible with for Android, for IOS system mobile phones and for PADs, as well as BT speakers or headphones that support the A2DP protocol. Specification: Item Type: BT Sound Connect Transmitter and Receiver Model: B28 Material: ABS BT Chip: CSR8675 BT Version: BT V5.0 Transmission Distance: >80m/262.5ft BT Protocol Support: RX: A2DP AVRCP TX: A2DP Input/Output Connection: SPDIE, 3.5mm Sound Working Time: RX& 65310;20H TX& 65310;15H Battery Type: 1000mAh Lithium Ion Battery (Built In) Package List: 1 x Sound Adapter 1 x Digital Fiber Optic Cable 1 x 3.5mm Sound Cable 1 x RCA Sound Cable 1 x USB Charging Cable 1 x Manual