From Casio, conquer demanding terrain and feel amazing with a rugged timepiece as bold and active as it is tough. Designed to work in the harshest environments, this G-Shock watch from the MASTER of G line is a truly tough piece of outdoor gear. With a mud-resistant structure to keep out fine dust and dirt, it is designed to withstand the most punishing conditions and the worst weather situations. This rugged timepiece is equipped with solar assisted charging, a heart rate monitor, built-in GPS functionality, and a high-definition, high-contrast memory-in-pixel (MIP) LCD for an easy read. The case is guarded by sizable metal components on the left and right, protecting the GPS antenna and six sensors inside, to deliver what you need for a wide range of activities. The trekking function allows you to check your heart rate while on the move so you can keep track of your physical condition during workouts. Check the tide graph for low and high tides to get the most out of water sports. The soft urethane band delivers a comfortable fit that your wrist will love and is textured on the top side so that even wet fingers can tighten it without slipping. The case, bezel, and band are made with bio-based resin, a material expected to help reduce environmental impact. With the engraved silhouette of the RANGEMAN wild cat character on a band piece, every detail of this timepiece exemplifies the spirit of this MASTER of G line of specialty watches.Case size (L× W× H): 60.6 × 53.2 × 20.3 mmCase and bezel material: Resin / Bio-based resinBio-based resin bandMud ResistantShock Resistant200-meter water resistanceTime adjustmentGPS signal reception: Manual receive (position information, time information)Power supply and battery lifeCharging system compatible with dedicated cable (requires device with Type-A USB terminal)Solar poweredSensor featureActivities: Multi-sport (running, trekking, walking, biking, swimming, others); Calculate and display distance, speed, pace, and other information using GPS or accelerometer; auto/manual lap function; auto pause functionTraining Analysis: Cardio load statusActivity Log Data: Up to 100 runs with up to 200 laps each, measurement time, distance, pace, running index, calories burned, energy source used, heart rate, maximum heart rate, cardio load, pitch, maximum pitch, stride, altitude gained, number of strokes, SWOLFWrist Heart Rate Measurement (30~220 bpm): Heart rate, target heart rate setting, graphic heart rate zone indication, heart rate graph, maximum heart rate, minimum heart rateSleep Measurement: Sleep recovery status (6 stages), sleep recovery stage display, sleep status (5 stages), sleep score display range (1 to 100, measurement unit: 1), autonomic nerve status (5 stages), ANS score range (-10 to +10, measurement unit: 0.1)Blood Oxygen Level Measurement*Breathing Exercise: Setting range (2 to 20 minutes in 1-minute increments), biofeedback, zone-specific time summaryStep Count Measurement: 3-axis acceleration sensor, step count display range (0 to 99999 steps), step count reset: automatic reset at midnight every dayActive Time Measurement: Special algorithm measures movement time using status analysis (walking, running, biking, undefined)Life Log: Step count, step count graph (week, month, 6 months), calories burned measurement, active time measurementStep reminderFloor Elevation MeasurementDigital compass: Measurement range: 0° to 359° 16-direction display Auto level correctionAltimeterBarometric Pressure MeasurementMobile link (Automatic connection, wireless linking using Bluetooth®)Mineral GlassWorld time: 38 time zones* (38 cities + coordinated universal time)