The BKHC BK Sport Bluetooth Earbuds are wireless in-ear headphones designed for people on the go. They are the perfect workout partner. The Bluetooth 4.0 technology allows you to stream music from any Bluetooth-equipped devices and with the built-in microphone and multimedia controls the BK Sport will pause the music for an incoming call from you smartphone. The Ambient Noise Reduction technology minimizes outside noise so you can enjoy rich, crystal clear sound and booming bass. The earbuds come with a variety of rubber eartips so it will fit securely in most ears and the flat cable design resists tangling so you do not have to waste time dealing with a mix of wires. The built-in rechargeable battery lasts up to five hours of continuous playtime and recharges in as little as two.