G-Shock Casio Master of G Land Rangeman Black Resin Watch –
Product Overview
The G-Shock Casio Master of G Land Rangeman Black Resin Watch is built for those who demand reliability in the most extreme environments. Part of the legendary MASTER of G series, this rugged timepiece is engineered to withstand mud, shock, water, and harsh weather conditions without compromising performance. Designed for outdoor adventurers, hikers, and fitness enthusiasts, it combines military-grade durability with advanced wearable technology. Whether you’re trekking through dense forests or training for endurance events, this watch delivers essential data and protection in a single, tough package. 
Key Features
- Mud-Resistant Construction: Engineered with a sealed structure that prevents fine dust and dirt from entering the watch, ensuring reliable operation in muddy, dusty, or sandy environments.
- Shock Resistant & 200m Water Resistant: Built to G-Shock’s legendary shock-resistant standards and rated for depths up to 200 meters, making it suitable for swimming, snorkeling, and water sports.
- Solar-Powered with USB Charging: Utilizes solar charging for everyday use and includes a dedicated cable charging system compatible with Type-A USB terminals for backup power when needed.
- Built-in GPS Functionality: Offers manual GPS signal reception for accurate position and time data, ideal for tracking routes during outdoor activities without relying on a smartphone.
- Heart Rate Monitoring: Features continuous wrist-based heart rate measurement (30–220 bpm), with target heart rate settings, zone indicators, and real-time heart rate graphs to monitor exertion levels.
- Multi-Sport Activity Tracking: Supports running, trekking, walking, biking, swimming, and more, using GPS or accelerometer data to calculate distance, speed, pace, and calories burned.
- Advanced Training Analysis: Provides cardio load status and running index to help assess workout intensity and recovery needs over time.
- High-Contrast MIP LCD Display: Memory-in-pixel technology delivers sharp, high-definition visuals with excellent contrast, ensuring readability in direct sunlight or low-light conditions.
- Reinforced Metal Case Guards: Protective metal reinforcements on the left and right sides shield the internal GPS antenna and six built-in sensors from impacts and environmental stress.
- Bio-Based Resin Band and Case: Constructed with eco-conscious bio-based resin, reducing environmental impact while maintaining durability and comfort.
Technical Specifications
- Case Size (L × W × H): 60.6 × 53.2 × 20.3 mm
- Weight: 92 g (approximately 8 ounces)
- Case and Bezel Material: Resin / Bio-based resin
- Band Material: Bio-based resin
- Water Resistance: 200 meters
- Power Source: Solar-powered with USB charging via dedicated cable (Type-A USB compatible)
- GPS: Manual signal reception for position and time data
- Heart Rate Range: 30–220 bpm
- Activity Log Capacity: Up to 100 runs, each with up to 200 laps
- Recorded Data Includes: Measurement time, distance, pace, running index, calories, energy source, heart rate, max heart rate, cardio load, pitch, stride, altitude gained, stroke count, SWOLF
- Additional Functions: Auto/manual lap, auto pause, target heart rate setting, heart rate zone indication
- Model Number: CAS-GPRH1000-9
- Department: Watches
- Manufacturer: Casio
- ASIN: B0CSVL23D4
- Date First Available: January 26, 2024
Benefits & Use Cases
This watch is ideal for outdoor professionals, endurance athletes, and adventurers who need a reliable tool that performs in unpredictable conditions. The mud-resistant and shock-resistant design makes it perfect for trail running, mountaineering, and field operations. With GPS and heart rate monitoring, it supports structured training by providing real-time feedback on performance and recovery. The solar charging system ensures long-term usability in remote areas where power access is limited. Whether you’re logging a 50-mile trek or analyzing your swimming stroke efficiency, the RANGEMAN delivers actionable insights. The bio-based materials also appeal to environmentally conscious users seeking sustainable gear without sacrificing toughness.
Important Notes
Charging requires a device with a Type-A USB terminal and the dedicated cable (not included). GPS functionality is manual and must be activated by the user. For detailed warranty information, please refer to the manufacturer’s official policy. Customer reviews reflect a 4.7 out of 5-star rating based on 33 verified purchases as of the latest update.
