The HBH-200 Bluetooth Headset is a unique handsfree with display and phone calling functions. On incoming calls, the display shows who's calling. You can hear the ring tone in the earpiece. The HBH-200 clips onto your clothing and can also be hung on a lanyard. The headset supports the Bluetooth Headset and Handsfree profiles, and works with all Sony Ericsson Bluetooth phones as well as most other Bluetooth phones on the market.