features advanced True Wireless (TWS) BT 4.2 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 BT Design: Wireless dual ear stereo design, left and right ear channel separation. BT 4.2 connection, strong transmission signal in high quality and high speed. Lightweight Invisible: The BT headset with 4g lightweight, mini size and ultra-soft ear caps, provides you long time wearing comfort, and guarantee 100% stability. Built-in Microphone: High-sensitivity microphone enables hands-free call, reduces ambient noises and grasps the detail of voice, ideal for in-car calling or working use. Charging Box: 400mAh charging box enables headset charging for 3-4 times. The headphones will be charged automatically in the charging box and stop automatically after fully charged. Long Battery Life: 50mAh battery in each headphones ensures 2 hours of working time. One multifunctional touch button supports touch operations, effortless and comfortable.