Men's digital watches Casio G-Shock GW-7900B-1ER are made of high quality synthetic resin. They are lightweight but sturdy at the same time. They are designed with respect to user's comfort, but also to resist mechanical onslaught. They have a wide range of intelligent functions (see below), and stand out especially because with these features they save its owner a number of costs in terms of time and finances. For their structural and functional propositions the G-Shock series models are also known as military watches. With the model Casio G-Shock GW-7900B-1ER manufacturers artfully combined intelligent features, along with an attractive design, which excites every adventurer.