WiWU Transparent Wireless Bluetooth Earbuds T21 Ergonomic Semi earphone black

T21 Model: T21 Color: Black, White, Orange Bluetooth: V5.3, Chips AD6973D4 Battery: 300mAh for charging case, 30mAh for earbud Charging time 2 hours Working Time: 3.5H for phone call, 4h for music play; Standby time 180 H Semi-in ear design, HIFI music, ENC earbuds