1、[V5.0] Bluetooth adapter has Bluetooth 5.0 chip, faster transmission speed, more stable connection and lower power consumption. 2、[One Key Control] 2 in 1 Bluetooth transmitter receiver one key operation, convenient and quick, switch on and off, answer and hangup. 3、[For Car Speaker] When driving, connect the mobile phone to the B12S via Bluetooth, and plug the 3.5mm cable into the car to enjoy music. 4、[RⅩ Mode] RⅩ mode changes to Bluetooth speaker in seconds, traditional speaker is connected to AUX or RCA speaker port. 5、[Basic Parameters] Working Time: More than 5 hours; Charging Time: About 1 hour; Input or Output Connection: 3.5mm stereo interface. Item Type: Bluetooth Transmitter Receiver Material: PVC Bluetooth: 5.0 Transmission Distance: Approx. 10m / 33ft Working Time: More Than 5 Hours Charging Time: About 1 Hour Input or Output Connection: 3.5mm Stereo Interface Built in Lithium Battery: 220mAh (included) 1 x Bluetooth Transmitter Receiver 1 x Manual 1 x Cable