1、[V0] Bluetooth adapter has Bluetooth 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 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: 5mm stereo interface. 1 x Bluetooth Transmitter Receiver1 x Manual1 x Cable Item Type: Bluetooth Transmitter Receiver Material: PVCBluetooth: 5.0Transmission Distance: Approx. 10m / 33ftWorking Time: More Than 5 HoursCharging Time: About 1 HourInput or Output Connection: 3.5mm Stereo InterfaceBuilt in Lithium Battery: 220mAh (included)