The PRO TREK brand advocates experiencing the wonders of nature, as well as enjoying and preserving them. The PRW-61 uses environmentally friendly biodegradable plastics in the case, strap and back cover. For the first time in a PRO TREK device or any Casio watch, the case and band are made of environmentally friendly biodegradable plastics instead of conventional resins. The use of biodegradable plastics also offers robust resistance to heavy use, as well as comfort on the wrist. We are proud of this new material application for our PRO TREK line of outdoor tools. To provide optimal wear resistance and a tight seal, the housing back cover is made of high-strength plastics made from biodegradable materials. The housing back cover also has a wider flat surface for improved torsional strength. Dial contrast has been enhanced by using a stark white for the large bar indicators and hour and minute hands, providing optimal visibility in the field. The stainless steel bezel is engraved with city codes to provide the look of outdoor equipment. Like the original watch function, it also has functions such as multiband 6 and Tough Solar. This is an incredibly practical and functional model that fits different situations with just the right size.

Basic information

Dimensions (L × W × H)

54.2 × 47.4 × 14.7 mm

Weight

53 g

Case and bezel material

Resin/Stainless steel

Strap

Resin strap

Water resistance

Water resistant to a depth of 10 bars

Environmental resistance

Resistance to low temperatures (-10 ℃/14 ℉)

Power supply and battery life

Tough Solar (solar-powered)

Sensor function

Digital compass Measures and displays orientation as one of 16 points Measuring range: 0 to 359° Measuring unit: 1 ° 60 seconds continuous measurement North hand indication Bidirectional calibration Magnetic declination correction

Altimeter measuring range: Between -700 and 10 000 m (between -2300 and 32 800 ft) Measuring unit: 1 m (5 ft) Indication on altitude difference hand Manual memory measurements (up to 30 records, each including altitude, date and time) Automatic log data (high/low altitudes, cumulative ascent and descent) Others: Relative altitude readings (±100m/±1000m) and selectable measurement interval: 5 seconds or 2 minutes *1 second only during the first 3 minutes *Switching between meters (m) and feet (ft).

Barometer display range: Between 260 and 1100 hPa (between 7.65 and 32.45 inHg) Display unit: 1 hPa (0.05 inHg) Indication on pressure difference hand Atmospheric pressure trend graph Barometric pressure trend information alarm (acoustic signal and arrow indicate significant pressure changes) *Switching between hPa and inHg

Thermometer display range

of thermometer: Between -10 and 60 ℃ (between 14 and 140 ℉)

Display unit: 0.1 ℃ (0.2 ℉)

*Change between degrees Celsius (℃) and degrees Fahrenheit (℉).

Exterior

Glass

Mineral crystal

Crown

Screw-down crown

Surface treatment

Gray ion-plated bezel

Other

Neobrite

Watch functions

World time

World time with 29 time zones (29 cities + coordinated universal time), one-touch access to UTC time zone, daylight saving time on/off and local city/world time switching

Stopwatch

1/100 second stopwatch

Measurement capability: 23:59'59.99''.

Measurement modes: Elapsed time, fraction of time and time of first and second position

Timer

Countdown timer Unit of measurement: 1 second Countdown interval: 60 minutes Countdown start time setting range: 1 minute to 60 minutes (1 minute increments)

Alarm / time signal

5 daily alarms

Time signal

Illumination

Double LED light

LED light for the dial (full automatic LED light, super-illuminator, selectable illumination duration [1.5 or 3 seconds] and brightness)

LED backlight for digital display (full auto LED light, super-illuminator, selectable illumination duration [1.5 or 3 seconds] and brightness)

Light color

LED: white

Mute function

Activation or deactivation of button push tone

Correction function of the initial position of the hand

Automatic correction of the initial position of the hands

Power saving function

Power saving (display goes blank and hands stop to save power when the watch is left in darkness)

Battery display / alert

Battery level indicator

Run time

Approximate battery run time: 6 months with rechargeable battery (operating period with normal use without exposure to light after charging) 25 months with rechargeable battery (operating period when stored in total darkness with power saving function activated after full charge)

Accuracy

Accuracy: ±15 seconds per month (without signal calibration)

Other options

Manual or automatic hand change function (during altitude, barometric pressure and temperature measurement)

Normal time indication: Analog: 3 hands (hours, minutes [hand moves every 10 seconds], seconds) Digital: Hour, minutes, seconds, a.m./p.m., month, date and day

Time setting details

Time calibration signals

Station name: DCF77 (Mainflingen, Germany)

Frequency: 77.5 kHz

Station name: MSF (Anthorn, England)

Frequency: 60.0 kHz

Station name: WWVB (Fort Collins, United States)

Frequency: 60.0 kHz

Station name: JJY (Fukushima, Fukuoka/Saga, Japan)

Frequency: 40.0 kHz (Fukushima)/60.0 kHz (Fukuoka/Saga)

Station name: BPC (Shangqiu city, Henan province, China)

Frequency: 68.5 kHz

Reception of time calibration signal

Automatic reception up to six* times a day (the rest of the automatic reception is canceled as soon as successful)

*Five times a day for the Chinese calibration signal

Manual reception

The latest signal reception results