Product Overview
The Casio PRW3500 Series from the Pro Trek line is a high-performance outdoor watch engineered for adventurers, hikers, and outdoor professionals who demand precision and reliability in extreme conditions. Built with advanced sensor technology and solar-powered functionality, this watch delivers accurate environmental data and dependable timekeeping without the need for frequent battery changes. Its rugged design meets the needs of those navigating remote trails, scaling mountains, or working in challenging environments. With atomic time synchronization and global time zone support, it ensures you’re always on schedule, no matter where your journey takes you.
Key Features
- Atomic Timekeeping – Automatically synchronizes with atomic clocks in the US, UK, Germany, Japan, and China via Multi-Band signal reception, ensuring split-second accuracy and eliminating manual time adjustments.
- Pro Trek Version 3 Triple Sensor – Integrates three precision sensors: an altimeter for elevation tracking, a barometer/thermometer for weather monitoring, and a digital compass for directional navigation. Enhanced accuracy over previous models supports better decision-making in the field.
- Tough Solar Power – Features an integrated solar panel that recharges the battery using both natural sunlight and artificial UV light, providing long-term power without battery replacements under normal use.
- 200 Meter Water Resistance – Rated for depths up to 200 meters (660 feet), making it suitable for swimming, snorkeling, and water sports, while remaining fully functional in wet or humid conditions.
- Stopwatch & Countdown Timer – Includes a 1/100-second stopwatch with a 999:59’59.9″ capacity and multiple timing modes (elapsed, split, and dual-split), plus a countdown timer adjustable from 1 minute to 24 hours in 1-second increments.
- World Time – Displays time across 31 time zones and 48 cities, with daylight saving time on/off options, ideal for frequent travelers or those coordinating across regions.
- 5 Daily Alarms – Features four one-time alarms and one snooze alarm, allowing users to set reminders for appointments, medication, or activity schedules.
- Full Auto LED Backlight – Provides bright, automatic illumination in low-light conditions, ensuring readability during nighttime operations or in dark environments.
- Stainless Steel Rotary Bezel – Allows manual tracking of bearings and navigation headings, supporting orienteering and route planning in the field.
- Barometric Pressure Tendency Alarm – Alerts users to rapid pressure changes, helping predict incoming weather shifts such as storms or clear skies—critical for outdoor safety.
Technical Specifications
- Model Number: PRW3500T-7
- Series: Pro Trek
- Water Resistance: 200 meters (660 feet)
- Power Source: Tough Solar (rechargeable via sunlight/UV)
- Timekeeping: Multi-Band Atomic (US, UK, Germany, Japan, China)
- Sensors: Altimeter, Barometer/Thermometer, Digital Compass (Triple Sensor Version 3)
- Stopwatch: 1/100 second precision, up to 999:59’59.9″
- Countdown Timer: 1-second to 24-hour range
- World Time: 31 time zones, 48 cities + UTC
- Alarms: 5 daily (4 one-time, 1 snooze)
- Dimensions: 1.97 x 1.97 x 1.97 inches
- Weight: 5.92 ounces
- Battery: 1 A-type rechargeable (included)
- Department: Men’s
- Manufacturer: Casio
- ASIN: B00U171U4C
- Date First Available: April 2, 2015
Benefits & Use Cases
The Casio PRW3500 Series excels in outdoor and professional settings where environmental awareness and time precision are critical. Hikers and mountaineers benefit from real-time altitude readings and weather trend alerts, helping them avoid hazardous conditions. The digital compass and rotary bezel support navigation in remote areas without GPS. Its solar charging eliminates battery anxiety on extended trips, while atomic timekeeping ensures accurate scheduling for pilots, researchers, or travelers crossing time zones. The 200-meter water resistance and LED backlight make it reliable for diving, fishing, or nighttime expeditions. Whether trekking through forests, climbing peaks, or working in variable climates, this watch delivers essential data in a durable, self-sustaining package.
Important Notes
The model shown in images may differ slightly from the actual product being sold. This is for informational purposes only. The watch is not discontinued by the manufacturer and remains in active production. A manufacturer’s warranty is available and can be requested through Casio customer service. Always ensure proper care when exposing the watch to extreme temperatures or impacts, as with any precision instrument. Regular cleaning and avoiding prolonged exposure to chemicals will help maintain performance and longevity.


















