Specification: _x005f_x000D_ Bluetooth-Compatible version: Bluetooth-Compatible V5.1 _x005f_x000D_ Supported protocols RX: A2DP AVRC TX: A2DP _x005f_x000D_ Working frequency band 2.402GHz -2.480GHz _x005f_x000D_ Interface Type: Input:About 0.35cm/1.34inch Interface / Output: About 0.35cm/1.34inch Interface _x005f_x000D_ Built-in battery: 150mAh _x005f_x000D_ Charging time: about 2 hours _x005f_x000D_ Battery life: RX about 8H, TX about 5H _x005f_x000D_ Bluetooth-Compatible distance: About 10~15M/ 393.7~590.55inch(open space) _x005f_x000D_ Charging method: Type-c DV5V _x005f_x000D_ Applicable scene: speaker / car / computer / TV / power amplifier and other scenes _x005f_x000D_ Host size: About 6.6x2x1.2cm/2.6x0.79x0.47inch _x005f_x000D_ Packing size: About 12.5x7x2.3cm/4.92x2.76x0.9inch _x005f_x000D_ Product net weight: About 11g _x005f_x000D_ Full set gross weight: About 40g _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitors and lighting effects, the actual color of item might be slightly different from the color shown on the picture. Thanks! _x005f_x000D_ Due to different measurement methods, there may be 1~3cm error. _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Host _x005f_x000D_ 1 x Charging Cable _x005f_x000D_ 1 x Instruction 1.Exquisite Design:This product has a beautiful appearance, small and beautiful 2.Strong Stability:The Bluetooth-Compatible 5.1 chip is used, which has stronger compatibility and stability. 3.Cost-Effective:Bluetooth-Compatible receiving (RX), Bluetooth-Compatible transmitting (TX), and calling are three-in-one, with high cost performance. Through AUX, the car audio can be turned into a Bluetooth-Compatible speaker in seconds, allowing you to enjoy mobile phone music and voice navigation broadcasts. 4.Easy to Switch Between Modes:The built-in high-definition microphone supports hands-free calls, and the transmit/receive mode can be switched at will, as you like. The product has a built-in 150mAh rechargeable battery with long battery life.