Bluetooth 5.0, 4 hours of battery life, lole sound quality, hands-free call, plug and play, AUX interfaceBluetooth transmiion mode (TX): Convert wired audio into Bluetooth signal, and transmit it to Bluetooth device for outputBluetooth Receive Mode (RX): Receive Bluetooth signal and transmit it to wired audio through Bluetooth connectionConnect to the TV's 3.5mm audio interface, and transmit the sound to the headset via Bluetooth, so you are not afraid to disturb your family when watching movies at nightConnected to 3.5mm audio port, the speaker without Bluetooth function can also be played wirelelyConnect the bluetooth connector to the car AUX interface through the adapter/transfer cable (standard), and connect the bluetooth to the car stereo, which can not only make calls, but also listen to dynamic music, so that your journey is no longer lonelyLole sound quality CD-level enjoyment: high-resolution restoration of lole sound quality, bringing CD-level music experience only one, you can listen to the music in your phoneFully charged once and used for 4 hours: the built-in rechargeable lithium battery can be charged once, and can be used for 4 hours when the battery is low, which is convenient and worry-freeBluetooth 5.0 listening to songs without lag: low power consumption and high rate stable signal transmiion, listening to songs more smoothlyPackage :1 * Adapter1 * Charging cable1 * Manual1 * 3.5mm audio cable Specifications:Product model: C28 Bluetooth audio receiving and transmitting comboProduct color: blackBattery capacity: 140AmhWorking range: 10m (without any obstacles)Charging time: 1hUse time: 4hSuitable type: computer, TV, projector (transmiion mode)/speaker, earphone (reception mode)