1.The appearance of the product is exquisite.The latest Bluetooth 5.2 technology. 2.Adopt the latest QCC high-end Bluetooth chip design.With independent A and B buttons, the connected devices can be controlled independently. 3.With a separate audio light to identify the audio transmission method.Support RX, TX dual connection function. 4.TP-C charging port, more convenient e. 3.5MM audio input/output interface, strong versatility. 5.Built-in rechargeable battery, long battery life.The product connection is simple, without any cumbersome driving and downloading APP.Bluetooth version: Bluetooth V 5.2Supported protocols: RX: A2DP AVRCP TX: A2DPWorking frequency band: 2.402GHz - 2.480GHzPower Class: Power Class 2 (Class II)Signal-to-noise ratio: 99.3dBDistortion: 0.1%Working current: Less than 22MABuilt-in battery: 250MAHCharging current: about 200MACharging time: about 2 hoursBluetooth distance: Greater than 12M (open space)Charging method: USB TYPE-C 5V/ 0.5AInput/output connection: 3.5MM audio interfaceMaterial: plasticcolour: blackPackage Contents:1 x Bluetooth 5.2 Transmitter Receiver1 x Type-C Cable1 x Audio Cable1 x English ManualOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.