Easy to use: High durability casing with clip for convenient carrying. Available in multiple colors and storage capacities to showcase your personality. Unique waterproof design with IPX8 rating, allowing you to listen to music while swimming. The MP3 player recharges easily via USB cable by plugging into a standard USB port on a computer or laptop. Built-in rechargeable lithium battery provides up to 6–8 hours of playback time after a 2-hour charge. Waterproof depth up to 10 meters (32.8 feet). Supports media files including MP3, WMA, and WAV formats. FM radio frequency range: 87 MHz to 108 MHz. Power supply: Built-in lithium battery. Charging time: approximately 2 hours. Playback time: 6–8 hours. Color: Black (4GB). Material: Plastic. Package contents: 1 x MP3 Player. Note: Light reflection and display differences may cause slight color variation between the image and the actual item. Measurement error allowed within +/- 1–3 cm.