Plantronics' L510 Bluetooth headset can be used not only with a mobile, but the desktop charger also doubles as a Bluetooth adapter for a landline phone. When a call comes in on your landline, an additional component will lift the landline handset, and the call will be patched through to the headset with the press of a button. Alternately, when a call comes in via your mobile, it can be picked up using the cell phone. The headset is extremely light and comfortable with a behind-the-ear fit and a sleek style that won't make you look like a telemarketer. A short boom mic helps capture your voice and folds away for easy storage. The L510 promises six hours of talk time and five days of standby time.