Styled in gray, these Shadow Wireless Earphones by Sol Republic are able to receive audio via Bluetooth between multiple sound sources, allowing you to switch between two such Bluetooth-enabled devices. It does so while providing a pleasurable sonic experience, particularly in the bass and high-end frequency bands. With these earphones, you can also answer/end phone calls—and play and pause music—directly from the biomorphic neckband, which has been designed to ensure a comfortable fit. What's more, the battery on these earphones can last up to eight hours after a single charge. Included with the earphones are four sets of various-sized eartips and a USB charging cable.