Overview:BT 5.0 technology brings high-speed data transfer speed, stable performance, and low power consumption. With T-WS 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: LenovoModel Number: XT90BT Version: 5.0Transmitting Distance: 10m/33ftDrive Diameter: 13mmFrequency Range: 20-20KHzSensitivity: 90±3dBImpedance: 32ΩCharging Case Battery Capacity: 3.7V 300mAhEarbuds Battery Capacity (Each): 3.7V 35mAhWorking Time: about 3 hours (depends on music volume)Color: BlackEarbud Weight (Each): 3.5g/0.12ozPackage Size: 13.7*9.0*3.0cm/5.39*3.54*1.18inPackage Weight: 90g/3.17oz 

Package List:1 * Pair of Earbuds1 * Charging Case2 * Pair of Earcaps1 * Charging Cable1 * User Manual (English/Chinese)