The Whooshi hi-fi amplifier equips wired headphones with Bluetooth, thus en­abling wireless high-quality transmission from a smartphone, tablet or laptop. Alternatively, it can be used as an amplifier for a laptop audio system. Thanks to a 300 mAh rechargeable battery, it enables more than eight hours of oper­ating time. The slim device with its recessed grips rests comfortably in the hand and, with a practical clip, is easily attached to clothing.