Features1. **Lightweight and Durable Design:** The case is designed with lightweight materials, measuring 1.97 x 1.1 inches and weighing only 0.15 pounds, making it convenient to carry.2. **High CostEffectiveness:** The charging case is made of durable PC material and soft ABS plastic, providing a smooth and durable feel. It's a good option for replacing a lost or damaged charging case.3. **Fast Charging and Builtin Battery:** After a full charge, the charging case's large battery can charge the device approximately twice. Charging is convenient at home, in the office, in the car, or while traveling. The builtin chip protects the device from short circuits, overvoltage, overcurrent, and overcharging, ensuring safe use.Specification* Bluetooth version: 5.0 (Dual ear Call)* Colors: Black, White, Gold* Bluetooth transmission distance: 15M* Battery capacity: LeftRight 30mAh* Battery Model: Polymer Battery401012* Base battery: 502030* Speaker: F10* Working current: 18mA, standby current: 4uA* Standby time: 130h* Talk time: 4.5 hours* Music time: 4.5 hours* Charging time: 1 hour* Charging case capacity: 250mAhPackage Includes:* 1x Wireless Bluetooth earphones (with charging case)