A7 true wireless BT Headphone is specially designed for you to listen music and answer calls while doing sports or driving, which features advanced True Wireless 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: True Wireless BT Design: Wireless dual ear stereo design, left and right ear channel separation. You can use the Left and Right ear headset solely (single track mode), or use in pairs (stereo mode). Lightweight & Invisible: 5g lightweight, mini size and 4 pairs of eartips provide you long time wearing comfort, and guarantees stability when doing sports. Built-in Microphone: High-sensitivity microphone reduces ambient noises and grasps the detail of voice, ideal for in-car calling or working use. Charging Box: Turn the power switch of the charging box to ON, then the headphones can be charged in the 300mAh charging box. Long Battery Life: