The Citizen VIRT Bluetooth watch (W700) communicates with your mobile phone and displays incoming calls. With vibration and light flashing you get notified that a call comes in. A small organic EL display is used to display name of the caller if the phone has an entry for it. Another very useful feature of the Bluetooth watch is that it notifies you if you leave your phone behind. The design of the world's first commercially available Bluetooth watch is a bit too industrial for my taste. The display is way too small and it is too thick with close to 15mm. The Citizen VIRT is charged with a contact-less charging station similar to the ones the SPOT watches are using. The battery life of the Citizen Bluetooth watch is about 5 days. Measurements of the watch are 40.0mmx42.4mmx14.6mm and the weight is 55g.