Above – G-Shock GB-5600AA, below – GB-6900AA. All images are clickable

The first rugged watch from the most popular line Casio G-Shock with modules Bluetooth appeared in March of this year. Alas, they were focused on the Japanese market and worked exclusively with Japanese Android smartphones. Two new models – GB-5600AA and GB-6900AA – have also been announced so far only for the Land of the Rising Sun, but they have already been declared compatible with iPhone 4S.

Casio does not intend to deviate from the canons of the line. In appearance, the watch is similar to other G-Shocks, but inside they have a Bluetooth module, and not just Bluetooth, but energy-saving Bluetooth 4.0. After pairing with 4S, you can set up alerts for incoming calls, new iMessages, and mail on your watch. Alerts come in two types: beep or vibration. You receive a Push notification on your iPhone about a new letter, the device sends a signal about it via Bluetooth to the watch – and they either vibrate, or make a sound, or both. Forgot your smartphone on a table in a cafe? When you leave, the watch will “feel” that the signal is getting weaker and notify you. Plus, another useful feature, which is a local analogue of Find My iPhone: with G-Shock, you can turn on the sound and vibration of the phone itself. This is not a Pebble, of course, but the list of features is quite good. By the way, lovers of purely “watch” functionality will need time synchronization between two devices.

It is gratifying that prominent players in the watch market are finally joining the wireless technology race. The start of sales of watches in the Japanese market will take place in October (model GB-6900AA) and in November (GB-5600AA). The cost is 18,000 yen, or something like $230. [verge]