Designed to augment the sound of tablets and smartphones, the Logitech Mini Boom box is a very compact--and cute--Bluetooth speaker that has a built-in rechargeable battery, speakerphone capabilities, a line input, and touch controls. Its sound is impressive for its tiny size. Beneath the friendly, rounded frame of the Logitech Mini Boom Box lie some seriously mean speakers. This small Bluetooth speaker delivers surprisingly good bass, but not at the expense of higher tones. It also has a built-in mic so you can take calls from anywhere, great for an impromptu conference call. Small enough to fit in the palm of your hand, the Logitech Mini Boom Box has rounded edges that make it a lot more approachable than squared-off competitors.