Travel Accessories

Casio G-Shock Master of G Rangeman GPRH1000-1D Black Watch


Conquer demanding terrain and feel amazing with a rugged timepiece as bold and active as it is tough.
Designed to work even in the harshest environments, the RANGEMAN GPR-H1000 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 muscular timepiece is equipped with 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.
Enjoy all this functionality, with no sacrifice in comfort. 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.
Metal side guards to endure hard use

Sizeable metal components guard the watch’s high-precision devices, including the module, sensors, and GPS antenna, from the shock of drops and other impacts. A forged metal button guard protects the main control button at the 9 o’clock position. The complex moulded form of the sensor cover at 3 o’clock is created with metal injection moulding (MIM), using finely powdered metal.

Mud Resist buttons to withstand harsh conditions

The buttons are protected by cylindrical stainless-steel parts, and the button shafts are equipped with gasket fittings to prevent contamination with mud and dust. Target mark-inspired notches provide anti-slip top surfaces. Designed with a passion to deliver utility enabling more reliable multifunction control in the most punishing conditions, from environments with abundant mud, dirt, sand, or rubble, to severe weather situations.
Measurement functions to support active use in the field

Support for nine activities, including trekking. Functionality designed for outdoor use, with tide graph display capabilities, as well as direction, altitude, air pressure, and temperature measurements.

Trekking: Distance, time, pace, compass bearing, altitude, ascent and descent, heart rate, calories burned, etc. Running, walking, trail running: Distance, speed, time, pace, heart rate, calories burned, etc. Biking: Distance, speed, time, altitude, road gradient, heart rate, calories burned, etc. Open water swimming, pool swimming: Distance, time, calories burned, etc. Gym workouts, interval training: Time, heart rate, calories burned, etc.

6 sensors + GPS functionality to track movement in real time

Six sensors including a heart rate monitor accurately detect body movement as well as changes in the natural environment. The watch also includes built-in GPS functionality to measure position, distance, and speed of movement. Track a range of factors in real time while you’re on the move.

Optical heart rate sensor: Uses LED light to measure changes in blood flow and track heart rate Accelerometer: Analyses movement to measure activity such as number of steps taken Gyroscope: Tracks swimming strokes and turns in the pool. Also helps with compass calibration. Magnetic sensor, pressure sensor and thermo sensor: Tracks compass bearing, altitude/air pressure, and temperature. Accurately detects changes outdoors and in other environments.

Analysis functions for improving performance

Based on the body’s data captured by the watch, your current performance and condition are displayed in an easy-to-understand format. This data analysis utilises algorithms from Polar, a company with a well-established reputation for heart rate-focused training analysis.

RUNNING INDEX | Powered by POLAR® | Calculates VO2max (maximal oxygen uptake) during running.

*Running Index scores are calculated in RUN activities only.

Cardio load | Powered by POLAR® | Understand how much strain your training session put on your cardiovascular.

Cardio load status | Powered by POLAR® | Displays current training conditions based on cardio load data from past workouts.

Energy sources | Powered by POLAR® | Calculates fats, carbohydrates, and proteins as percentages of calories burned.

Route travelled (App) Displays routes travelled during activity on a map within the app.

Support functions: Helpful for self-management

Loaded with features helpful for monitoring recovery, managing health, and keeping track of logs. Easy-to-understand display of various forms of data in the app makes it simple to check daily activity logs, training status, and other information.

Nightly RechargeTM | Powered by POLAR® | Analyse how well your body recovers overnight from exercise, overall stress, and other demands of your day.

*Nightly Recharge™ is a trademark owned by POLAR Electro Oy.

Breathing exercises | Powered by POLAR® | Follow the animated display to maintain a steady rhythm of deep breathing.

Blood oxygen level measurement The optical heart rate sensor tracks the level of oxygen taken into the blood.

*The blood oxygen level measurement function is not intended for use in diagnosing illness or as a medical device. It is intended only for use in maintaining general health.

Life log Displays daily log of activity including number of steps and calories burned in an easy-to-understand format.

My Page (App) Displays timelines of activity log, life log and other records.

Water Resistance:
200 M
Smartphone Link Feature:
Mobile link (Wireless linking using Bluetooth®)
Automatic Connection
Auto time adjustment
Easy Watch Setting
Approximately 300 world time cities
Notification function (incoming calls, incoming e-mails, new social media posts, calendar notifications, reminders)
Training analysis data
Activity History
Life log data
Sleep analysis data
Tide graph setting (approximately 3,300 global points)
Phone Finder
Time Zone setting
World Time:
• World time
• 38 time zones* (38 cities + coordinated universal time)
• Daylight saving on/off
• Auto summer time (DST) switching *
• May be updated when connected to a smartphone.

• Measuring unit: 1 second
• Countdown range: 60 minutes
• Countdown start time setting range: 1 second to 60 minutes (1-second increments)

• LED backlight (Super Illuminator)
• Full auto LED light
• Selectable illumination duration (1.5 seconds or 5 seconds)
• Afterglow

Full auto-calendar (to year 2099)
Energy Saving Feature:
Power Saving (Display goes blank to save power when the watch is left in the dark)
• 1 second stopwatch
• Measuring capacity: 99:59’59”
• Measuring modes: Elapsed time, split time

Alarm/Hourly Time Signal:
4 daily alarms with snooze
Smart alarm (with snooze)
Mute Feature:
Button operation tone on/off
Battery Display/Alert
Battery Level Indicator
Moon Data
Moon data (moon age of the specific data, moon phase)

  • Description

Band Type:
Bio-based Resin Band
Case And Bezel Material:
Bio-based Resin
60.6 × 53.2 × 20.3 mm


Compatible Band Size:
145 to 215 mm

Mineral Glass
92 g
Sensor Feature:
• Activities: 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 function
• Training Analysis: Cardio load status
• Activity 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, SWOLF
• Wrist 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 rate
• Sleep 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 summary
• Step Count Measurement: 3-axis acceleration sensor, step count display range (0 to 99999 steps), step count reset: automatic reset at midnight every day
• Active 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 measurement
• Step reminder
• Floor Elevation Measurement
• Digital compass: Measurement range: 0° to 359° 16-direction display Auto level correction
• Altimeter: Measuring range: -700 to 10,000 m (or -2,300 to 32,800 ft.) Display range: -10,000 to 10,000 m (or -32,800 to 32,800 ft.) Measuring unit: 1 m (or 5 ft.) Measuring interval: 2 minutes/5 seconds Altitude differential measurement: -3,000 to 3,000 m (or -9,840 to 9,840 ft.) Altitude graph
• Barometric Pressure Measurement: Measuring range: 260 to 1,100 hPa (or 7.65 to 32.45 inHg) Display range: 260 to 1,100 hPa (or 7.65 to 32.45 inHg) Measuring unit: 1 hPa (or 0.05 inHg) Auto measurement interval: 2 hours Barometric pressure graph Barometric pressure change indicator
• Temperature Measurement: Measurement range: -10.0 to 60.0℃ (or 14.0 to 140.0℉) Display range: -10.0 to 60.0℃ (or 14.0 to 140.0℉) Display unit: 0.1℃ (0.2℉)

* The blood oxygen level measurement function is not intended as a medical device for diagnosing specific diseases. It is intended for general health maintenance only.

• Shock Resistant
• Mud Resistant

Time Adjustment:
Radio-controlled Watch
Multi band 6
Time Adjustment Details
GPS signal reception: Manual receive (position information, time information)

Power Supply And Battery Life:
Charging system compatible with dedicated cable (requires device with Type-A USB terminal) & Solar powered

Light Color:
±15 seconds per month (with no GPS signal reception and mobile link function)
Run Time:
Using activity functions (GPS, heart rate):
• HIGH RATE (continuous reception): Approx. 14 hours max.
• NORMAL (continuous reception): Approx. 16 hours max.
• LONG (intermittent reception): Approx. 19 hours max.

• Using in watch mode with heart rate measurement OFF: Approx. 2 months
• Using with power-saving function ON: Approx. 23 months
• Note: Varies depending on usage environment; from full charge, without solar power.

Other Features:
• Airplane mode
• Vibrator
• 12/24-hour format
• Regular timekeeping: Hour, minute, second, am/pm, month, date, day
• Vibration on/off
• Tide graph