Don't give up control. The NW-E405 is incredibly small about the size of a pack of gum yet it still has a 3-line display. This means you can better manage your music because you can view all the important track information (song title song duration battery life etc.). It comes with 512MB storage capacity letting you load up with 345 songs. The NW-E405 also features excellent battery life: up to 50 hours of playback on one full charge. And If you're down to your last bar just quick charge it. A three minute charge gives you three hours of battery life.4 It's time to step up to Sony. 512MB Built-In Memory Stores 345 songs on the device. 3-Line Organic Electroluminescence Display (Displays Song Title Length Battery Indicator and much more) The 3-line display offers a wide viewing angle high quality display with a unique look. View information about the music settings or time/calendar in any lighting condition. Super Quick Battery Charge A three minute charge will provide up to three hours of playback. Up to 50 Hours of Playback Life with Rechargeable Embedded Battery Internal battery provides up to 50 hours of continuous playback on each charge. Plays Back MP3/ATRAC3/ATRAC3plus Audio Formats For customers who already have extensive music libraries use the included software and hardware to store and play back their collection of MP3s. For the customer who is just getting into digital music and downloading Sony's ATRAC format provides higher sound quality with smaller sizes than many competing formats. This enables the user to store more music and have longer listening times. Time/Calendar Display View current time and date. Smart Clip Supplied The included multi-purpose clip will attach to both the music player and belts bags pockets and many other surfaces. One Handed Jog Dial Operation Access your information on the fly with the easy-to-use Jog Dial navigator. One handed/finger operation allows the user to simply scroll and click. The information and operation is truly at their fingertips. Supports WMA WAV Audio Formats The Network Walkman player plays back ATRAC3 ATRAC3plus format and MP3 files and supports WMA and WAV. Transfer Personal Downloaded Music and CD Recordings Between your CDs and your PC creating your own music mixes for on-the-go enjoyment. Skip Proof Design-No Moving Parts For uninterrupted playback even while carrying the Network Walkman player during active uses. Connects to USB Port for High Speed Data Transfer After mixes have been created in the jukebox they are easily transferred at high speed to the device. Multi Language Display Displays encoded text data that can include the artist name disc name and/or track name. Music Management Software Supplied Import manage and easily transfer your digital music collections with the supplied music management software.