An evolution of the bestselling Triple Sensor-equipped Rangeman GW-9400 (2013) and successor to the discontinued Rangeman GPR-B1000 (2018) with MIP LCD display, the GPR-H1000 is a professional-use Master of G series with trekking and survival features such as a compass (with auto level correction), thermometer, and pressure sensor (with altimeter and barometer). The watch also has fitness and health features, a first for the Rangeman series, including an optical heart rate monitor, accelerometer for step tracking, and gyroscope. The GPR-H1000 is equipped with GPS to acquire location information, and it also has a tide graph, sunrise and sunset times, and moon data. Like the GPR-B1000, it is officially resistant to dust and mud with its cylindrical button structure protected by gaskets.

As a G-Shock, the watch is fully shock-resistant and water-resistant to 200 meters. Other features include Bluetooth smartphone link, wired USB charging, and solar-assisted charging. Wired charging is required for activity tracking and heavy sensor use, but it should be possible to power basic watch functions with solar power only. The time display is powered by solar and will remain active when the battery charge is low.

The Polar-powered fitness functions are like the G-SQUAD GBD-H2000 and include blood oxygen level status, cardio load status, VO2 max (under “running index”), types of energy used (ratio of fat, carbohydrate, and protein), sleep monitoring, and life log data for step tracking. There is also a breathing exercise function for recovery and a smart alarm (with snooze) that determines periods of lighter sleep to gradually wake the user. The watch has an activity log memory and is capable of tracking nine types of activities, including trekking, running, biking, gym workout, interval timer, pool swimming, open water swimming, trail running, and walking. This is similar to the activity tracking of the GBD-H2000, with the addition of trekking. (The trekking activity adds direction, altitude, and climbing speed, to the usual distance, time, pace, heart rate, and calories burned measurements.)

The activity order and number of activities on the watch can be adjusted with the Casio Watches smartphone app, along with target alert settings for time, distance, altitude, and calories burned. Along with the fitness tracking and analysis functions, the Bluetooth connection offers auto time adjustment, simple time settings (with function order customization, watch settings, 300-city world time, and 3,300 points for the tide graph), phone notifications, and phone finder.

The GPS on the GPR-H1000 is used for activity tracking and can track route movement on the smartphone app, but routes, waypoints, and end points cannot be set on the watch as they could on the GPR-B1000. Like the GBD-H2000, the GPR-H1000 can also receive current position coordinates and adjust the current time using GPS.

The other basic watch features are the same as the GBD-H2000 and include a 1-second stopwatch (max 99:59’59”, with split times), countdown timer (max 60 minutes), world time with auto DST, power saving, 4 alarms with snooze, vibration, and full auto LED backlight with 1.5 or 5-second duration. The watch measures 60.6 x 53.2 x 20.3 millimeters and weighs 92 grams. Externally, the GPR-H1000 is made of bio-based resins and has a soft urethane band with a metal band keeper. There are large metal side guards to protect the internal components and the buttons. The watch is 29 grams heavier than the GBD-H2000 due to these metal parts and button structures, but it is significantly smaller and lighter than the GPR-B1000. Unlike the GPR-B1000, the GPR-H1000 does not have a sapphire crystal and is equipped with mineral glass.