This Pyle-Home black rechargeable mini-speaker provides powerful, portable audio at a great price. Your ears won’t believe your eyes when you hear the punch these speakers pack. This speaker may look small, but it expands with a unique vacuum bass design for surprising volume and response. It’ll hook up easily to any MP3 player, iPod, iPhone, or even your laptop - anything with a 3.5mm jack. The built-in lithium rechargeable batteries will let you play music for up to 8 hours and charge via USB. Delivers high quality audio from 100 Hz to 20 kHz. Includes USB and 3.5mm cable. The PMS2B is the perfect stereo speaker system for your iPod, iPhone, Macbook, or any laptop and MP3 player. The Bass Expanding speakers are in a capsule shape for ultimate portability, then separate and extend for surprisingly big stereo sound that must be heard to be believed. Features one amplified speakers with built-in rechargeable batteries, vacuum bass expansion, USB charging. Includes charging cable, audio cable, and cable wrap. It features a standard 3.5-mm ''mini'' jack, so it's ready to play all iPod/iPhone models and pretty much any other audio device with that audio jack. Great for Laptops. Most laptops are a bit lacking in the speaker department. The Pyle Bass Expanding is a quick and convenient way to enhance your music.