Overview: BT 5.1 technology brings high-speed data transfer speed, stable performance, and low power consumption. With true wireless stereo technology, you can use the headset solely or used them in pairs. Equipped with a 250mAh charging box to store and charge the earbuds. Built-in Microphone delivers a clearer and more realistic sound. It will bring you a perfect user experience. Features: BT 5.1 technology ensures higher data transfer speed, more stable and fast 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 calls, and activate voice assistant. Built-in Mic on both earbuds with intelligent noise reduction delivers clearer talking sound in stereo mode. A 250mAh charging case can charge and store the earbuds. 30mAh battery in each earbud ensures about 5 hours of music time. Specifications: Brand Name: Lenovo Model Number: LP1 Pro BT Version: 5.1 Transmitting Distance: up to 10m (no obstacle) Drive Diameter: 10mm Frequency Range: 20-20KHz Sensitivity: 104dB+/-3dB Impedance: 32 Ohm Charging Case Battery Capacity: 3.7V 250mAh Earbuds Battery Capacity (Each): 3.7V 30mAh Music Play Time: about 5 hours (depends on music volume) Charging Time: about 1.5 hour Color: Black, White (Optional) Earbud Weight (Each): 3.2g/0.11oz Package Size: 12.0*9.0*3.6cm/4.72*3.54*1.41in Package Weight: 91g/3.21oz Package List: 1 * Pair of Earbuds 1 * Charging Case 1 * Charging Cable 1 * User Manual (English)