IPOD Technical specifications Size and weight Height: 1.07 inches Width: 1.62 inches Depth: 0.41 inch (including clip) Weight: 0.55 ounce Volume: 0.5 cubic inch (not including volume under clip) In the box Ipod shuffle Earphones Dock Quick start guide Capacity 1gb usb flash drive(1) Holds up to 240 songs in 128-kbps aac format(2) Stores data via usb flash drive Audio Skip-free playback Frequency response: 20hz to 20, 000hz Mp3 (8 to 320 kbps), mp3 vbr, aac (8 to 320 kbps), protected aac (from itunes store, m4a, m4b, m4p), audible (formats 2, 3 and 4), wav, and aiff Headphones Earphones Frequency response: 20hz to 20, 000hz Impedance: 32 ohms Mac system requirements Macintosh computer with usb port Mac os x v10.3.9 and later Itunes 7.0.2 or later(3) Windows system requirements Pc with usb port Windows 2000 with service pack 4 or later or windows xp home or professional with service pack 2 or later Itunes 7.0.2 or later(3) Environmental requirements Operating temperature: 32fp to 95fp f (0fp to 35fp c) Nonoperating temperature: -4fp to 113fp f (-20fp to 45fp c) Relative humidity: 5% to 95% noncondensing Maximum operating altitude: 10, 000 feet (3000 m) Input and output 3.5-mm stereo headphone minijack Power and battery(4) Built-in rechargeable lithium polymer battery Playtime: up to 12 hours when fully charged Charging via included usb dock Full-charge time: about 4 hours In the box Ipod shuffle Earphones Dock Quick start guide