Bluetooth handset/earpiece for the Mitel 6930 (S)IP Phone, Mitel 6940 (S)IP Phone and Mitel 6873 (only MiVoice 415, 430, 470 and VA) SIP Phone, volume control, mute, answering and ending calls using buttons on the side of the handset, integrated contacts for charging on the phone, LED indicates the charging status, Bluetooth technology with HD voice quality