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The Casio Pro Trek PRW-6900BF-1 Bonfire pairs an analog-digital display with a compass, barometer, altimeter and thermometer, plus Tough Solar charging and Multiband 6 radio time calibration. Casio’s published specifications make it a feature-rich outdoor watch; they do not establish real-world sensor accuracy, comfort or durability. This is a specifications-based guide, not a firsthand review.
What the PRW-6900BF-1 offers
The watch combines Triple Sensor functions with practical timekeeping and outdoor-oriented features. Casio lists these functions for the model on its Japan product page and Mexico product page.
- Compass: digital direction readings.
- Barometer and altimeter: atmospheric pressure and altitude functions.
- Thermometer: a temperature display.
- Power and timekeeping: Tough Solar charging and Multiband 6 radio time calibration.
- Everyday functions: world time for 29 cities, a 1/100-second stopwatch, timer and five alarms.
- Visibility: a full-auto double LED light identified by Casio as Super Illuminator.
Published dimensions and sensor ranges
Casio Mexico publishes a case size of 49.6 × 44.8 × 14.7 mm and a weight of 65 g. Its specifications list a bio-based resin and stainless-steel case/bezel, with a soft urethane band using bio-based resin. These figures describe the Mexico listing; check the exact regional SKU when comparing or buying.
| Specification | Casio Mexico listing |
|---|---|
| Compass direction | 0–359° in 1° increments |
| Altimeter range | -700 m to 10,000 m |
| Barometer display range | 260 to 1,100 hPa |
| Thermometer range | -10°C to 60°C |
| Water resistance | 10 bar, also stated as 100 m |
| Low-temperature resistance | -10°C |
The sensor figures are published operating or display ranges, not evidence of field accuracy. The water-resistance and cold-resistance ratings likewise should not be treated as activity-specific recommendations.
#1 Best Overall
- Casio's Tough Solar Technology charges your watch by converting light to energy
- Part of Casio's green initiative - Featuring Eco-Friendly Biomass Construction and environmentally friendly / recyclable packaging, paperwork & user's manual
- 100M Water Resistance | Rotating Bezel | Super Illuminator w/ Full Auto LED/LCD Screen
- Bluetooth Ready | Pair with your smartphone, and easily record the date, time, or your position on a map within the Casio App
Why Casio calls it Bonfire
The name refers to the design rather than a separate function. Casio describes the forged-texture metal bezel as evoking cast-iron cookware. The dial treatment draws on camping equipment, including a Dutch-oven surface and a small hand modeled on a camping knife. Red phosphorescent details on the hands’ tips and indexes are intended to recall firelight. Casio says the treatment appears white in light and red in darkness; that is the manufacturer’s description of the visual effect, not an independent measurement.
Casio Japan also says bio-based plastic is used in the case, band and resin case back. That identifies materials; it does not quantify the watch’s lifecycle environmental impact.
Rank #2
- Tough Solar Power, 100M Water Resistant, Low Temperature Resistant (-10 C / 14 F), Altimeter, Digital Compass, Barometer, Thermometer. Thermometer Display range: -10 to 60 C (14 to 140 F) Display unit: 0.1 C (0.2 F)
- Full Auto LED (Super Illuminator) Backlight with Afterglow, World Time, 31 time zones (48 cities + UTC), city name display, daylight saving on/off, Sunrise/Sunset Data, 5 Daily Alarms (4 one-time and 1 snooze alarm)
- Hourly Time Signal, 1/10 Second Stopwatch, Countdown Timer, 12/24 Hour Formats, Button operation tone on/off
- Storage Battery: Solar Rechargeable Battery, Battery Level Indicator
- Power Saving Function, Approx. Battery Life: 9 months on full charge (without further exposure to light), Module 3415
Release, regional pricing and availability
Casio Japan lists the PRW-6900BF-1JF with an October 2023 release month and a suggested retail price of ¥71,500 including tax. Casio Mexico lists the PRW-6900BF-1 at MX$14,199. Those are manufacturer-published regional figures, not a universal price or confirmation of current retail offers.
Casio’s Japan collection page marks the PRW-6900BF-1JF as discontinued in Japan. The Mexico product page still presents the model and a regional price. Neither listing establishes worldwide discontinuation or current stock in any market, so check local availability and the exact model suffix before purchasing.
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Rank #3
- Eco-Friendly Design for True Explorers Constructed with bio-based resin and a flame-retardant faux leather band, this watch combines sustainability with rugged durability for serious outdoor enthusiasts.
- Triple Sensor Technology Stay informed with on-demand compass bearings, barometric pressure changes, altitude tracking, and accurate temperature readings—wherever the trail leads.
- Tough Solar Power No batteries to replace. The solar-powered battery keeps your adventures going, with up to 27 months of runtime in power-saving mode.
- 100M Water & -10°C Temperature Resistance Designed to withstand both freezing mountain mornings and wet river crossings—this watch is ready for any environment.
- Dual-Layer LCD with Direction Bezel Navigate your journey effortlessly with a large, easy-to-read display and rotating bezel for directional orientation.
What the specifications can—and cannot—tell you
The published feature set is useful for comparing the watch on paper: it has the four named sensor functions, solar charging, radio time calibration, a 10-bar water-resistance rating and a 65 g listed weight in Mexico. The documentation does not independently verify how accurately the sensors perform in the field or how the watch wears over time. It also does not establish battery performance, durability, or value against alternatives. Those judgments require testing or directly comparable evidence beyond the manufacturer’s specifications.
Quick Recap
Best Value
- Triple Senser; Silicone Band; Tough Solar; Multi Band 6; 100M Water Resistant; Digital Compass w/Bearing Memory
- Altimeter; Barometer; Thermometer; World Time; Full Auto LED Light; 5 Daily Alarms; 1/100th Sec. Stopwatch; Countdown Timer; Full Auto Calendar; Power Saving Function
- Quartz Movement ; Measuring unit: 1 m (5ft) ; Manual memory measurements (up to 30 records, each including altitude, date, time)
- Case Diameter: 51.5mm
- Water resistant to 100m (330ft): in general, suitable for swimming and snorkeling, but not diving
Rank #4
- Solar-powered sport watch with stainless steel rotating bezel featuring digital dial with day/date display and backlight , Thermometer Display range - -10 to 60 C , Display unit - 0.1 C
- Features triple sensor, atomic timekeeping, low-temperature resistance, digital compass with bearing memory, altimeter, barometer, thermometer, sunrise and sunset data, world time, four daily alarms with snooze, 1/10-second stopwatch, countdown timer, 12/24-hour formats, and power-saving function and 56 mm resin case with mineral dial window
- Titanium band with fold-over-push-button-clasp-with-safety closure
- Water resistant to 200 m (660 ft)
- Altimeter Measuring range: -700 to 10,000 m
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
