In 2007, to commemorate its sponsorship of the ARWorld Series, Casio released the special watch model PRG-110AR, which is based on the slim, solar-powered, triple-sensor watch, the PRG-110.
The PRG-110 includes 3 types of sensors to detect bearing, altitude/barometric pressure, and temperature and also features a solar-powered system. At a thickness of only 11.5mm, the model has a water resistance up to 100 meters.

The coloring of the PRG-110, a navy blue body with light green function names matches well with the ARWorld Series logo. The back cover, band ring, and EL backlight illustration also utilize the logo to suit the special model’s design.
The outdoor watch PRO TREK was also the official watch of the Adventure Racing World Series in 2006.
Technical details
Model: Casio PRO TREK PRG-110AR
Compass
16 points, measuring range (0°- 359°), 20 seconds continuous measurement, bearing memory function (direction, graphic), 4 bearing graphic display (North, South, East, West), bidirectional calibration and northerly calibration function, magnetic bearing deviation correction function
Barometer
Display range; 260hPa – 1,100hPa, atmospheric pressure differential graphic, atmospheric pressure tendency graph (past 24 hours graph display), changeover between hPa and inHg
Altimeter
Display range; -700m – 10,000m, able to record the last 40 altitude measurements with the month, date and time (while also holding in memory the highest and lowest altitudes, total ascent and descent altitudes, and cumulative ascent and descent altitudes), base altitude setting function, altitude graph display, altimeter time setting (2 minutes/5 seconds), altitude differential function (±3000m), 4 patterns for the user display
Thermometer
Display range; -10°C up to 60°C, Changeover between Celsius and Fahrenheit
World time
29 time zones (30 cities), daylight saving setting
Stopwatch
1/100 second, measuring capacity: 24 hours
Countdown timer
Measuring unit: 1 second, countdown range: 24 hours
Alarm
5 independent daily alarms, hourly time signal
Other functions
Chronograph Digital display, full auto-calendar (until 2099), 12/24 hour format, 3 different basic displays available
Construction
Low temperature resistant (-10°C)
Display
EL backlight (with afterglow), full automatic EL light, button operation tones on/off
Power source
Tough Solar power system (high capacity solar charging system)
Continuous operation
About 20 months with the power saving function ON after full charge
Size of case / total weight
56.9mm×47.4mm×11.5mm / 59g
Water resistance
100 meters