The HB-1 Headset is a monaural Bluetooth headset with a clean and stylish design perfect for the office/remote worker and is compliant with our IP phones, models D40, E50 and suitable for use with PCs and laptops. The HB-1 is made from lightweight materials with an adjustable headband, super comfortable padded ear cushion, and a pivoting flexible boom mic that can be rotated so that the user can wear the headset on either the left or the right.