The iHM89 is an amazing approach to audio that offers size-defying sound. Speakers connect to a computer or other USB power source via the included USB cable to recharge the internal lithium ion battery. Remarkable design gives surprising volume and bass response in speakers that fit in your palm. Perfect for laptops, cell phones, iPad, iPhone, iPod and other MP3 players, any audio source. Magnetic base for compact travel, includes travel pouch. Rechargeable Battery Built-in rechargeable battery Long-lasting internal lithium ion battery gives speakers plenty of power up to 8 hrs. (Initial charge 3-5 hrs.)Sound Beyond Size Size-defying sound Vacuum bass design provides surprising volume and bass response in a small space-saving stereo speaker system that fits in your hand Supplied cable for charging speakers and connecting to audio source 2 -in-1 cable has a USB plug for charging speaker and audio plugs for connecting to audio source so you can charge speaker while listening Power and charging LED indicators Mini speakers for any audio source Speakers work with any 3.5 mm headphone jack, perfect for laptops, cell phones, portable game devices, MP3 players, etc. Magnetic base keeps speakers together for travel Magnetic base keeps speakers together for travel Convenient carry pouch Though they fit in the palm of your hand, itâ€s nice to have the convenience of a carry pouch