Fidelity Mist Plus Portable Speaker for all MP3 players (Blue) 2 channel digital stereo amplifier with 2 watts of RMS sound Flip-out 3.5mm plug for direct connection to headphone jacks Estimated 8 Hours of Continuous Play with 2 AAA batteries Great with the iPod Shuffle, or with other MP3 or CD Players, Camcorders, and PSP Convenient Keychain for your Key Ring