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＞20H TX＞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