B8 2-in-1 Bluetooth 5.1 Receiver Transmitter RCA 3.5mm AUX Audio 3D Sound Adapter for Car TV Speaker

• Built-in high-definition call microphone, one-click answering calls
• High-end Bluetooth 5.1 chip design, fuller and richer sound quality
• One-key switch between RX and TX modes
• RCA, I2S audio input/output interface, freely switchable
• Built-in 250mAh battery, long battery life, 8-12 hours of use
• Has memory function, automatic reconnection can be realized in both receive mode and transmit mode

Specification: 

• Bluetooth version: Bluetooth V5.1
• Supported protocols: RX: A2DP, AVRCP, HFP TX: A2DP
• Working frequency band: 2.402GHz -2.480GHz
• Power class: Power class 2 (Class II)
• Audio codec: SBC
• Working current: RX<22MA, TX<35MA
• Built-in battery: 250mAh
• Charging current: about 200mA
• Charging time: about 2 hours
• Battery life: RX>12H, TX>7H
• Bluetooth distance: >10m (open space)
• Charging method: Micro USB 5V/0.5A
• Input/output connection method: AUX interface
• Compatible: Android, IOS system mobile phones and tablets, and Bluetooth speakers or headphones that support A2DP protocol to connect for use