It's the small speaker with the big, big voice. The Sound Link Mini Bluetooth speaker II delivers full sound with dramatically deeper lows than you'd expect from a speaker that fits in the palm of your hand. And because it's wireless and ultra-compact, it's easy to take Bose sound anywhere. The Sound Link Mini II has a built-in speakerphone, so you can take calls out loud with clear sound. And voice prompts talk you through Bluetooth pairing, so connecting to your music is easy. The speaker's lithium-ion battery provides up to 10 hours of unplugged playtime, and it can be conveniently charged from most USB power sources.