Boombotix BB1 Portable Speaker for iPod/iPhone, MP3 players & computers - Meany Greenie High Fidelity Speakers that KICK! Rechargeable Lithium-Ion Battery provides 4-6 hours of playtime per charge Plugs into your iPod, iPhone, MP3 player, laptop, or home computer via standard headphone jack Comes with 3 foot retractable male-to-male 3W rated/5W Max