Bang & Olufsen is following up the A2 with their take on the portable Bluetooth speaker, the A1. A rugged disc of aluminum and molded polymer combines in a powerful piece of audio hardware that's perfect for travel. Inside the aluminum shell hides 2 x 30W and 2 x 140W drivers and amplifiers for huge sound in a small package. Battery life is rated for all-day use, literally. The speaker will give you 24 hours of playback and once you run out of juice, its USB-C charger will get you back to 100%.