Bose SoundLink Flex is a rugged, ultra-portable Bluetooth speaker that delivers surprisingly full sound from a sub-pound chassis. Bose's PositionIQ automatically detects orientation (upright, on its side or hung from the strap) and adjusts EQ to keep audio balanced. IP67 sealing means it's waterproof and dustproof, while the silicone-wrapped soft-touch body shrugs off bumps and drops in the great outdoors.