taking occasional shots at integrating Bluetooth into wrist-bound baubles for several years now, but the problems have been pretty obvious -- Bluetooth wasn't really optimized to transfer nibble-sized chunks of information while sipping almost imperceptible amounts of power, so you end up with a watch that dies in hours or days rather than years. That's where Casio comes into play, showing off a prototype watch here at CES that makes use of Bluetooth Low Energy to connect to your phone and keep you abreast of calls and emails without the hassle of pulling the handset out of your pocket (or, worse yet, your belt-mounted holster). You can also silence alarms just by tapping on the watch, get your time synced, and generally look awesome while doing it -- if it were a production unit, that is. Problem is that there aren't any phones on the market with Bluetooth 4.0 support just yet, but Casio's confident enough that they're in the pipeline to say that they want to product their first BLE-enabled retail watches in 2011. The company is claiming two years of battery life off a single coin cell assuming twelve hours of use a day... so yeah, the benefits for this type of product are pretty clear. Follow the break for the full press release.