Feature: 1. Long Endurance: The rechargeable 350mAh charging case of this wireless earbuds ensures 5 to 6 hours of use on a single charge. Automatic charging when placed in the case means no worrying about battery life while out and about, meeting your needs all day long. 2. Bluetooth 5.3 Technology: Fast, stable, and efficient transmission for an excellent connectivity experience. Take out the left and right earbuds from the charging case, connect, and enjoy uninterrupted calls or music without worrying about sound loss. 3. Versatile Usage: The wireless Bluetooth headphones are suitable for laptops, for iOS, for Android devices, providing stereo sound for calls, fast and stable transmission. 4. Waterproof Design: The Bluetooth earphones are sweat and rain resistant, perfect for sports, music, and calls without worry, can be used in outdoor environment. 5. Ergonomic Design: The Bluetooth 5.3 headphone comfortably fits your ears for an active life style, allowing you to focus on your workouts and sports activities. Specification: Item Type: Wireless Bluetooth Earbuds Material: ABS Color: Silver Grey Earphone Battery Capacity: 2Pcs 45mAh Lithium Battery (Built in) Charging Case Battery Capacity: 350mAh Lithium Battery (Built in) Bluetooth Version: 5.3 Transmission Distance: Approx. 10m / 32.8ft. Package List: 2 x Earphones 1 x Charging Case 1 x Data Cable Note: The charging case is not waterproof.