The basic Sennheiser CX 300S earbuds allow you to listen to music anytime, anywhere. Use the remote in the cable to control the music and answer incoming calls. The remote has a microphone that allows you to make hands-free calls. This way, you can keep your hands free and leave your phone in your pocket. The cable of the earbuds is flat and won't get tangled as easily as a round cable. This makes the earbuds last longer.