Hoco TWS EW19 Plus Delighted True Wireless Bluetooth Headset 1. Bluetooth 5.3; Chip: JL 6983D2 2. Battery capacity: charging case 300mAh; Headset 25mAh 3. Use time: 4 hours; Standby time: 180 hours 4. Size: 52.5*44.5*23mm; Weight: 44g 5. Support master/slave switch, summon Siri