Overview: BT 5.0 technology enables high-speed data transfer speed, stable performance, and low power consumption. With TWS technology, you can use the earbuds solely or in pairs. Equipped with a 400mAh charging box to charge the earbuds. Built-in Microphone delivers a clearer and more realistic sound. It will bring you perfect user experience. Features: BT 5.0 technology ensures higher data transfer speed, more stable and faster connection, and lower power consumption. True wireless dual-ear design, left and right earphone channels are separated. It can be used solely or in pairs. Touch control design, no more pressure on your ears. Easy to control music and call, and activate voice assistant. Built-in Mic on both earbuds with intelligent noise reduction delivers clearer talking sound in stereo mode. A 400mAh charging case can charge and store the earbuds. 40mAh battery in each earbud offers 6-8 hours of music time. 4.1g lightweight and mini size fit well to your ear canal, providing a long time wearing comfort and stability. Specifications: Brand Name: Lenovo Model Number: QT82 BT Version: 5.0 Transmitting Distance: 10m/33ft Drive Diameter: 13mm Frequency Range: 20-20KHz Sensitivity: 903dB Impedance: 32 Charging Case Battery Capacity: 3.7V 400mAh Earbuds Battery Capacity (Each): 3.7V 40mAh Working Time: 6-8 hours (depends on music volume) Charging Time: about 2 hours Waterproof: IPX5 Color: Black, White (Optional) Earbud Weight (Each): 4.1g/0.14oz Package Size: 10.2*10.2*4.3cm/4.01*4.01*1.69in Package Weight: 127g/4.48oz Package List: 1 * Pair of Earbuds 1 * Charging Case 2 * Pair of Earcaps 1 * Charging Cable 1 * User Manual (English/Chinese)