Overview: BT 5.0 technology brings high-speed data transfer speed, stable performance, and low power consumption. With TWS technology, you can use the headset solely or used them in pairs. Equipped with a 300mAh 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, stable and fast connection, and low 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 calls, and activate voice assistant. Built-in Mic on both earbuds with intelligent noise reduction delivers clearer talking sound in stereo mode. A 300mAh charging case can charge and store the earbuds. 35mAh battery in each earbud ensures about 3 hours of music time. 3.5g lightweight and mini size fit well to your ear canal, providing a long time wearing comfort and stability. Specifications: Brand Name: Lenovo Model Number: XT90 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 300mAh Earbuds Battery Capacity (Each): 3.7V 35mAh Working Time: about 3 hours (depends on music volume) Color: Black, White (Optional) Earbud Weight (Each): 3.5g/0.12oz Package Size: 13.7*9.0*3.0cm/5.39*3.54*1.18in Package Weight: 90g/3.17oz Package List: 1 * Pair of Earbuds 1 * Charging Case 2 * Pair of Earcaps 1 * Charging Cable 1 * User Manual (English/Chinese)