The Phoenix speaker from Beacon Audio is about the size of a coffee mug, but don’t let the size fool you. This Bluetooth-activated speaker has a rechargeable lithium-ion battery that’s capable of 8 hours of playback time. It measures 3.2″ X 3.2″ X 3.2″ and weighs 7 ounces, so it’s small enough to take with you. It connects with any Bluetooth-enabled device and has a range of 35 feet. There’s an audio-in jack on the back for use with non-Bluetooth devices, too. Beacon says the Phoenix is capable of room-filling sound at a quality and volume not usually found in a speaker so small. The Phoenix is available in black, blue, or red; it’s $99 at Beacon.