Features: Advanced bluetooth-compatible 5.0 technology, TWS dual channel, high-speed transmission, low power consumption and stable connection. New optimized design, air conduction, does not in ear, it is safe and stable, and it is comfortable to wear, even if you wear it for a long for time, you will not feel swelling and soreness, and you can enjoy every moment calmly. Stereo 9D HiFi audio sound, 14mm big speaker audio unit, metal composite diaphragm, you can enjoy very clear calling regardless of any noisy environment. Take out the automatic power-on second connection, switch between single and double at will, and take out one or two earphones from the charging compartment to automatically power on and connect back for quick use. for Touch the blind exercise with one hand, when you are exercising or busy with other things, you can easily switch songs, make quick calls, wake up the voice assistant, etc. 500mAh Large capacity charging for case, long-lasting working for time,type-c qucik charging port, single continuous listening for about 10h. Specifications: Model: J99 Wireless Earphone Speaker: 14mm Bluetooth-compatible Version: BLE 5.0 Dual Channel Input: 5V 1A Charging Compartment: 500 mAh Headset Battery: 70 mAh Max Continuous Listening to Music: about 30 hours Charging Port: Type-C Interface Transmission distance: 10m or 32.8ft (barrier free open environment) Material: ABS Charging Box: Approx. 92x63 mm or 3.62x2.48 inch Earbuds: Approx. 52x47.6 mm or 2.04x1.87 inch Color: White, Skin Color, Black(optional) Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Pair Earphones 1 Piece Charging for Case