The Citizen i:VIRT will alert you to incoming calls via vibration and flashing lights (which I am sure are configurable) and then flash up the caller ID on the watch display. If you have a headset unit, then you may never need to take you phone out of your pocket!
The i:VIRT comes with rechargeable batteries that lasts about 5 days. Recharging is contactless - like the modern shavers and tootbrushes - so it is just a matter of setting the watch down on it’s receptacle to keep the juice flowing.
Another cool feature of the i:VIRT is that it keeps track of your mobile phones’ whereabouts! Okay, that statement can be a bit misleading - the watch doesn’t really know where your mobile phone is - it only knows if your phone is not there. If you accidentally leave your phone behind, the i:VIRT will notify you that your mobile phone is missing once you are out of contact range between phone and watch.