Bang & Olufsen calls its Beoplay E8 headphone "Truly Wireless," perhaps because users will have a hard time believing that these tiny earbuds (or, as B&O prefers to call them, earphones) are genuine Bluetooth devices. They really are, though, and their design is one of the most elegant on the market. They come in a case small enough to fit comfortably in the palm of your hand, but that case is an essential part of the design. It's not only the charger for the earbuds but serves as an electrical storage battery that you can use to recharge the earbuds on the go. After a single charging session the buds can operate for four hours, but the case retains enough power to carry eight hours worth of additional charges without returning it to a power source.
The case charges off a standard USB cable. Fully charging the case requires about 2-1/2 hours. When you want to recharge the earphones, put them back in the case for 20 minutes for each extra hour of listening time. You'll need a smartphone running the B&O app to pair the phones with each other and with your player. You can control audio playback through a series of taps on the right and left units, and you can have the earphones answer (or ignore) phone calls.
These earbuds -- er, earphones -- are sleek, black and attractive, with the B&O logo on their outer surfaces. The orientation of the logo tells you whether the phones are correctly inserted, though you may need a friend's help (or a handheld mirror) to see if they're in the proper horizontal position. The package includes four different sizes of silicon ear tips, so you can fine tune the way the phones sit in your ear to find a size that's both comfortable and not prone to falling out.
Although Bang & Olufsen claims these earphones have their "pristine...Signature Sound," not all users agree, though this may depend on what audio codec your device is using for playback. (The AAC codec is recommended.) These earphones aren't cheap, though they're in a comparable price range with fullsized headsets. Alternative units that you can compare these with include the Beats Powerbeats3 Wireless and the Koar Kbone.
The headphones look and feel great. The only other issue I've had with the buds is periodic dropouts of the left earbud.
The left earbud sound is way lower than the right making the soundstage terribly unbalanced.