Handles calls and control volume directly from the Bluetooth headset. The HBH-PV700 is compatible with the Bluetooth™ mobile phones of both Sony Ericsson and other phone brands. With its low weight and ergonomic ear hook that fits both ears, the HBH-PV700 allows you to use stay truly handsfree an entire day. Additional Technical Details: Proven Bluetooth™ technology Use both hands when you’re on the phone Leave your phone in your pocket while you're handling calls Handle calls and adjust the volume through easily accessible buttons on the headset