Fangrui Product Details Features 1for Rca And I2s Audio Input/output Interfaces, Can Be Switched Freely. 2two Antennas, Bluetooth Use Distance More Than 80m/262.5ft, Strong Stability. 3hifi Lossless Sound Quality, Ultralow Delay Sound Output. Support For Aptx Ll/ Aptx/ Sbc/aac/ Fs. 4charging Time About 2.5 Hours, Rx Mode For More Than 10 Hours, Tx Mode For More Than 8 Hours. 5exquisite And Compact Design, Easy To Carry And Use. Suitable For Tv, Pc, Car And Headphones. Specification Item Type: Bluetooth Adapter Material: Abs Color: As Pictures Shown Weight: Approx. 162g/5.7oz Model: B2 Bluetooth Protocol Support: Rxa2dp Avrcp Txa2dp Transmission Distance: > 80m/262.5ft (barrier-free) Battery Capacity: 500mah Battery Type: Lithium Battery Working Hours: Rx> 10 Hours, Tx Averaged > For 8 Hours Charging Time: About 2.5 Hours Charging Voltage: Dc 5v Input/output Connection Mode: For Rca, 3.5mm Stereo Audio Interface Audio Codec: Aptx Low Latency, Aptx, For Sbc, Aac (rx) Package List 1 X Receiver 1 X Manual 1 X Charging Cable 1 X 3.5mm Cable 1 X 3 In 1 Connecting Cable