Sharper Image SBT561GY Bluetooth Wireless Headphones with On-Ear Volume Dial, Built-In Microphone, Grey Crank up the volume - not with buttons, but with a volume dial. It's a new way to control your music. Wireless Headphones by Sharper Image boast a dial that fills the ear cup, a statement piece sure to be the subject of conversation. Turn the dial to adjust the volume and enjoy every note of the definitive stereo sound the headphones dole out. Control music playback and phone calls from the buttons on the ear cup for a completely hands-free experience. Pair the headphones with any compatible smartphone, tablet, or other Bluetooth-enabled device to enjoy music, movies, and podcasts. The cushioned ear cups and adjustable headband work together for a comfortable and secure fit. Connectivity Technology: Wireless - Bluetooth