Specification: Colour: Black earbuds and charging box material: ABS Impedance: 16 Frequency response range: 20Hz-20KHz Rated power: 3mW Sensitivity: 98dB Talk time (medium volume): 3h Music time (medium volume): 3.5h Standby time: 15h Bluetooth version: 5.0 Transmission distance: 10m Headphone charging time: 1h Headphone battery capacity: 50mAh Charging box battery capacity: 350mAh Charging box charging time : 1.2h Specifications: Using CVC8.0 digital noise reduction technology The latest TWS binaural stereo stereo Bluetooth headset with the 5.0 chip gives you very efficient wireless performance. It adopts Bluetooth V5.0 chip, 10m connection distance, stable performance, high transmission, low consumption and strong compatibility. Ergonomically designed for a more comfortable fit on the auricle. IPX4 waterproof and sweatproof Strong compatibility, IOS/Android universal, one-button control, simple and stylish. Package Included: 1*Pair of Wireless Earbuds (Left & Right) 1*Charging Case 1*Charging Cable 4*Ear cap 1*User Manual Notes: Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Please leaving a message before you give the bad feedback, if the products have some problems. Thanks for your understandings.