features advanced True Wireless (TWS) BT 4.2+EDR technology, built-in high-grade microphone and speaker, hands-free function and lightweight design. A great companion for your daily life, office time, driving or travel. Features: TWS Headphone Design: Wireless dual ear design, left and right ear channel separation. You can use the headset solely, or used them in pairs (stereo mode). Hands-free with Mic: High-grade Microphone grasps the detail of voice and enables hands-free calls while driving or doing sports. Long Battery Life: 60mAh battery in each headphone ensures about 3 hours of working time. The charging box enables headset charging for 3-4 times. Charging Box: The headphones will be charged automatically in the 400mAh charging box and stop automatically after fully charged. Comfortable to Wear: 4g lightweight, mini size and 2 pair of soft earcaps provide you long time wearing comfort, and guarantee stability when doing sports.