Run wild with a wire-free， hands-free headphone that diminishes corded distractions whether you're working out， playing outdoors or taking a dip in the pool. Ready for a trip to gym or to take on your next swim， the IPX8 rated design holds up to both intense workouts and depths of up to 2 meters underwater without breaking a sweat. Plug it in for three minutes and you'll have up to 60 minutes of use - that's probably less time than it takes you to change into your workout gear. Get up to 8 hours of uninterrupted play when fully charged. Don't get stuck with just one music service. It's equally simple to drag and drop your favorite MP3s from your computers. And with multi-format playback MP3， WMA， AAC or L-PCM music files all sound amazing. How's that for freedom? Despite its sleek form factor， the NWZ-W273 holds hours of music with 4GB of internal memory (a portion of the memory reserved for system operation， available for the user approximately 3.54 GB). Finding something to listen to is simple with the multi-function playback buttons. One quick tap switches the track， while holding down the tap for longer changes the folder completely while in All Play mode. In Playlist mode， a quick tap changes songs， while a tap and hold changes the entire playlist. What's included: Sony NWZ-W273 mp3 player， Earbuds (Size S/M/L) Supplied in pairs， USB Cradle， Adjustment band， Quick Start Guide and documentations.