1. Bluetooth 5.3, chip: JL AC6983D2 2. Battery capacity: charging case 400mAh, earphones 40mAh 3. Use time: 7 hours, standby time: 180 hours 4. Size: 50x50x25mm, total weight: 37g 5. Charging case with LED digital display, the remaining power is clear at a glance 6. Support master-slave switching and summon Siri 7. Semi-in-ear design, comfortable to wear 8. Sleek and compact appearance, simple and attractive