Features 1. 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 for you to use. 2. High cost-effectiveness: The charging case is made of durable PC material and soft ABS plastic, with a smooth and durable feel and perfect feel. Replacing a lost or damaged charging case is a good option. 3. Fast charging and built-in battery: After being fully charged, the large battery size of the charging case can charge you about twice. Charging is very convenient at home, in the office, in the car, or while traveling. The built-in chip protects your device from short circuits, overvoltage, overcurrent, and overcharging, ensuring safe use. Specification Bluetooth version: 5.0 [Dual ear Call] Color: Black, White, Gold, Bluetooth transmission distance: 15M Battery capacity: Left/Right 30 Battery Model: Polymer Battery-401012 Base battery: 502030 Speaker: F10 Working current: 18ma, standby current: 4uA Standby time: 130h Talk time: 4.5 hours Music time: 4.5h Charging time: 1h Charging case capacity: 250mah Package Include: 1x Wireless Bluetooth earphones（With charging case）