Casio ProTrek Digital Black Dial Resin Bracelet Unisex Watch WSD-F21HR-BKAGB The Case: With its tough, durable case crafted from black resin, the Casio ProTrek is a truly rugged timepiece. The case of this watch measures a whopping 52.9mm in diameter and 16.8mm in thickness, making this a true beast on the wrist.  With various pushers, a highly interactive bezel featuring buttons and label aplenty with visible screws keeping things together, there is a real sense of no nonsense practicality to this durable watch. The case also holds a connection point for the ProTrek’s magnetic charger whilst the back is home to a high-quality Valencell optical heart rate sensor. The Dial: Things really begin to heat up when it comes to the dial of this uniquely functional timepiece. Always on, the 1.32-inch, dual-layer display is a touch screen that immediately invites you to interact! In fact, the screen of this watch is incredibly high quality compared to competitors, making it easy and enjoyable to use at all times.    With a useful anti-fouling coating, the dial of the Casio ProTrek is just as geared toward durability as the rest of this watch.  The Bracelet: Made from black resin to match the case, the bracelet of the Casio ProTrek only adds to the timepiece’s credentials as a highly durable watch. With a secure buckle closure , there is no chance of this watch slipping away and comfort is guaranteed. The Functions: A watch as packed with speciality functions at the Casio ProTrek is an uncommon thing indeed. Perhaps most notable of them all is the ability of this timepiece to function as a GPS system. Available for offload download, this feature allows the users to check their exact location anywhere on earth without the use of the internet, making the ProTrek perfect for adventurers of every stripe. Add to this a compass, an altimeter and a barometer and you have one seriously useful tool. With heart rate reading thanks to a monitor installed on the back of the watch, the ProTrek functions as a first-rate fitness tracker too with heart rate, pace and distance all easy to record. Indeed, with dozens of apps downloadable, the possibilities for keeping tabs on performance are near endless with this watch. Water resistant to 50m, the Casio ProTrek is about as rugged a watch with this level of technology around. GPS Compatible (including GLONASS and MICHIBIKI (QZSS)) Color Maps Compatible (supports offline use) OS Wear OS by Google Display 1.32-inch, dual layer display Color TFT LCD (320 × 300 pixels) and monochrome LCD Touchscreen Capacitive touchscreen (anti-fouling coating) Water Resistance 5 bar (50 meters) Environmental Durability MIL-STD-810G (United States military standard issued by the U.S. Department of Defense), low-temperature resistance (-10 °C) Sensors Optical sensor (heart rate), compass (magnetic) sensor, pressure (air pressure, altitude) sensor, accelerometer, gyrometer Heart Rate Measurement Yes Microphone Yes Vibrator Yes Battery Lithium-ion battery Wireless Connectivity Bluetooth ®  V4.2 (Low Energy) Wi-Fi (IEEE 802.11 b/g/n) Buttons MAP button, Power button, APP button Charging Method Magnetic charging terminal Recharging Time Approx. 2.5 hours at room temperature Battery Life (When GPS Not in Use) Normal use (Color display auto OFF):Up to 1.5 days Multi-Timepiece mode (timekeeping and sensors only):Up to 1 month Battery Life (Using GPS (activity)) Running/trail running (using heart rate measurement):Up to 20 hours Size of Case Approx. 61.7 × 57.7 × 16.8 mm (H × W × D) Weight Approx. 81 g (including wristband)   If you have any questions please click here Click here to join our facebook and Instagram !