Blackstone unique designed earbud will not fall out from your ear during driving, and it is comfortable for all-day use. Keep your hands free and guarantee safety while driving. Enjoy music or answer calls, whatever you want. With in-ear headset design, the BOROFONE BE14 Bluetooth earbud can bring a stereo sound that most Bluetooth earbud can\'t offer. Also it provides a portable power bank, never power off!