mobiBLU Cube 1 GB MP3 Player (Black) w/ 5 BONUS Music Downloads At only 1 inch in size, the mobiBLU Cube is the world's smallest, full-featured digital audio player. The brilliant OLED display lets you easily see track names, settings and battery status. Also features a multi-function headphone jack for USB 2.0 connectivity. 500 song (1 GB) capacity; plays 8 to 10 hours on a single charge. MP3, WMA, WMA DRM playback Built-in Voice Recorder; ideal for lectures and meetings; 33 hour capacity Platform support: PC and Mac 1 GB flash memory (up to 500 WMA songs) OLED (organic LED) display screen and blue back light color Frequency response: 20 Hz to 20 kHz Signal to noise ratio (SNR): 90 dB Equalizer modes: Normal, Rock, Jazz, Classic, Live, Custom Hi-speed USB 2.0 (25 Mbps) Audio line-out FM radio: 50 dB; 87.5 to 108 MHz Record FM radio Clock and date display Sleep timer SRS (Sound Retrieval System) WOW 3-D Sound Effects Batteries: built-in, rechargeable Lithium-Polymer Plays 8-10 hours on one charge Dimensions: 0.94"H x 0.94"W x 0.94"D Weight: 0.63 oz