Keep the music flowing even when you’re swimming with the waterproof Walkman . Featuring a compact and lightweight design that allows you to move freely, now you never have to leave your music behind.4GB capacityStylish colours, wireless & wearable designLightweight, comfortable and secured fit for Intense WorkoutDrag-and-drop function and ZAPPIN™ feature8 Hour battery life with 3 minute Quick Charge for 60 minutes playbackHi-Speed USBBuilt-in Rechargeable lithium-ion Battery; USB power (from a computer via a USB Cradle of the player)File Formats Supported : Mp3,WMA,AAC