Casio G-Shock Mudmaster Carbon Core Guard Black Quad Sensor Bluetooth Mens Watch GG-B100-1AER Part of the specialist Mudmaster series, this Casio G-Shock Mudmaster Carbon Core Guard Black Quad Sensor Bluetooth Mens Watch GG-B100-1AER is designed for use in the most extreme conditions. The watch features the all new carbon core guard case, with a dust and mud resistant structure that can withstand harsh land environments. The dial features red accents on the dial whilst being framed in a herringbone print and chrome finish bezel. A location indicator at 12 o\'clock displays the compass as well as more subdials displaying the day, date and month. An abundance of technical features which can be seen below to support land missions. Furthermore, the sensors can be linked to an app for data capture and monitoring. When paired to the app, your watch automatically adjusts to the correct time using your GPS location. A grey resin strap can then be fastened using a standard buckle. This watch has a water resistance of 200 metres, making it suitable for diving.  Key Features: Bluetooth Smart Smartphone Time Auto LED Light Mud-Resistant Case Shock-Resistant Neo-Display Digital Compass 10,000m Altimeter Altimeter Data Memory Height Gain Barometer Thermometer Steptracker Sunset/Sunrise Display Location Indicator Mission Log World Time Function Stopwatch Timer  5 Daily Alarms Phone Finder Auto Calendar 12/24 Hour Display Mineral Glass Standard Buckle 200m Water Resistant 2 Year Battery Life         The Family: Master of G Casio’s Master of G family has always been about showcasing the very latest technology Casio has to offer long before it is introduced to the main G-Shock and Pro Trek lines. No matter what the conditions or the terrain; the wearer can rely on the Master of G series’ innovative features to deliver impressive toughness and unbeatable reliability, all while still retaining sporty and exclusive styling. Designed to be “watches for tough professionals,” Casio’s Master of G range elevates the already revolutionary G-Shock to the paramount of durable watchmaking.   The Brand: Casio Casio was established in 1946 by Japanese engineer Tadao Kashio. The company entered the timepiece market in 1974 with the release of the Casiotron, the world’s first Auto Calendar watch. Only eleven years after entering this field, Casio completely reshaped global thought about the function a watch should perform with the release of the pioneering and now legendary G-Shock family. Innovation and world firsts have defined the company’s history ever since, the most striking of these being the release of the first ever touch screen watch in 1991, 24 years before the Apple Watch, and the first ever wrist camera watch in 2000. In short, Casio was producing smartwatches decades before the term had even been coined. Add to this the hipster popularity of the company’s retro designs, and Casio has firmly cemented its reputation as a famously reliable and precise name in both analogue and digital watches.