Remarkable sound quality & call clarity: K6 BlueTooth 4.1 headphones with mic use state-of-the-art echo elimination to make conversations sound like they’re taking place face to face. Noise cancellation technology makes it easy to hear your favorite songs and the person you’re speaking to. Plus, the A2DP profile provides HD sound quality. Sync with 2 devices pair: K6 earbuds with microphone and volume control with two different devices to listen to music on one and talk on the other, to answer calls on your work and home phones or to browse 2 different music libraries. Chat & listen for longer: This wireless earbuds are powered by a powerful lithium ion battery for up to 8 hours of music, 9 hours of talk time and 220 hours of standby. You can recharge fully in just 2 hours to have the headset ready for use again. Engineered for comfort: K6 BlueTooth earpieces were made to provide a perfect fit! You get two different earbuds to choose from to ensure that you’re comfortable no matter how long you wear them. The receiver can be rotated up to 180 degrees, and the microphone rotates across 200 degrees for a truly custom fit. So easy to control: The intuitive design of K6 bluetooth headphone makes it easy to control the volume, start and stop the music, answer calls and move between songs. You can leave your phone or tablet safely in your bag or on your desk!