ProTrek PRT-B50 / 5601 / Step Count, Calorie Calculations & Bluetooth

Size	★★★
Weight	★★★★★
Functions	★★★★★
Materials	★★
Battery Years	★★★
Price	★★★★

How did we compose this rating? Enjoy our calculations →

Detailed PRT-B50 technical specs are here →

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About PRT-B50 in Short. PRO TREK’s ability to combine the best that technology has to offer and innovative designs has made it the timepiece of choice for climbers, hikers, campers, and other outdoor enthusiasts. Now the PRT-B50 Series adds Bluetooth® capabilities that enable data communication with a smartphone running the PRO TREK Connected app, for the ultimate in ease of use.
The Quad Sensor system uses compact sensors that make it possible to pack compass, altitude/barometer, and temperature measurements, along with an accelerometer that keeps track of your step count, into a compact configuration. Calorie calculations use both step count and altitude information to take upgrades and downgrades into consideration, and calories burned values are recorded by the app. The app automatically records altitude data measured by the watch and route information acquired by a smartphone’s GPS, and you can manually plot altitude points along your route using a Route Log feature.

General Information

Price	250$ *average Amazon Price, we may earn commission from purchases
Year of First Release	2019
Model Range	BLUETOOTH
Battery Type	Solar (ProTrek Batteries)
Manual	5601 (official)

PRT-B50 Model Range *may be updated

*Want to be the first to know about new ProTrek Updates? Here we store all recent Monthly ProTrek Updates →

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Official PRT-B50 Specs / Features *for base version PRT-B50-1

Case / bezel material: Resin
Resin Band
Mineral Glass
Direction Bezel
100-meter water resistance
Double LED light
LED light for the face (Auto LED light, Neon illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
LED backlight for the digital display (Auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
Low-temperature resistant (–10°C/14°F)
Mobile link (Wireless linking using Bluetooth®)
Digital compass
Measures and displays direction as one of 16 points
Measuring range: 0 to 359°
Measuring unit: 1°
60 seconds continuous measurement
Hand indication of north
Magnetic declination correction
Direction calibration (2-point calibration, figure eight calibration, auto calibration)
Altimeter
Measuring range: –700 to 10,000 m (–2,300 to 32,800 ft.)
Measuring unit: 1 m (5 ft.)
Hand indication graph of altitude differential
Manual memory measurements (up to 14 records, each including altitude, date, time)
Auto log data (High/low altitudes, cumulative ascent and descent)
Others: Relative altitude readings (±100 m /±1000 m), selectable measurement interval: 5 seconds or 2 minutes (1 second for first 3 minutes only)
*Changeover between meters (m) and feet (ft)
Barometer
Measuring range: 260 to 1,100 hPa (7.65 to 32.45 inHg)
Measuring unit: 1 hPa (0.05 inHg)
Hand indication of pressure differential (±10hPa)
Atmospheric pressure tendency graph (last 20 hours or last 56 hours)
Barometric pressure tendency information alarm (beep and arrow indicates significant changes in pressure)
The atmospheric pressure tendency graph can show the last 20 minutes or last 56 minutes of measurements. The hand indication of pressure differential shows values in units of ±1 hPa.
*Changeover between hPa and inHg
Thermometer
Measuring range: –10 to 60°C (14 to 140°F)
Measuring unit: 0.1°C (0.2°F)
*Changeover between Celsius (°C) and Fahrenheit (°F)
Step count using a 3-axis acceleration sensor: 0 to 999,999 step count display range
Power Saving: Auto sensor sleep state entry after fixed period of non-activity
World time
38 time zones (38 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping
Sunrise, sunset time display
Sunrise time and sunset time for specific date
1/100-second stopwatch
00’00”00～59’59”99 (for the first 60 minutes)
1:00’00～23:59’59 (after 60 minutes)
Measuring unit:
1/100 second (for the first 60 minutes)
1 second (after 60 minutes)
Measuring modes: Elapsed time, split time, 1st-2nd place times
Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-minute increments and 1-hour increments)
5 daily alarms
Hourly time signal
Hand shift feature
Full auto-calendar (to year 2099)
12/24-hour format
Button operation tone on/off
Regular timekeeping:
Analog: 3 hands (hour, minute (hand moves every 10 seconds), second)
Digital: Hour, minute, second, am/pm, month, date, day
Accuracy: ±15 seconds per month (with no mobile link function)
Approx. battery life: 2 years on CR2025
Size of case : 57.5×50.8×15.8mm
Total weight : 64g

ProTrek PRT-B50 on the wrist!

Feedback from users *accumulated information from our own comments and emails, forum threads, socials, reviews, etc.

PROs
+ the time function is very accurate which is reassuring
+ keep track of my walking and fitness routine
+ the dial is easy to read
+ the movable bezel, which makes the compass actually useful
+ lots of features all of which seem to work pretty well

CONs
– large face/crystal
– the negative (dark) display and small digits makes it harder to read
– step counter is usually lower than actual counts

The most distinctive specs of PRT-B50 *Editorial
— 100-meter water resistance (good for swimming but not for deep diving)
— ProTrek Connected App (you may manage all watch settings through your phone)
— Mobile link (Wireless linking using Bluetooth(R)) (for time sync with your phone data)
— Digital compass (measures and displays direction as one of 16 points)
— Step count (A built-in 3-axis acceleration sensor begins counting steps the moment you start to walk.)
— Thermometer (can measure and display the outside temperature in a range from -10 C to 60 C)
— Barometer (measures the air pressures and displays tendencies in the weather)
— Altimeter (The electronic mechanism “estimates” the altitude based on the air pressure)
— Low temperature resistant (stable operation of the watch is guaranteed even at a temperature of -20°C)
— Sunrise, sunset time display (Sunrise time and sunset time for specific date)

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Official PRT-B50 Video

Enjoy our ProTrek PRT-B50 Watch Review

A good start, gentlemen. I’m delighted with this “smart” approach: when we can enjoy traditional analog beauty and still match the 21st-century technologies. Yes, there are still many smartphone connections, no “low-energy” GPS, but I am sure a new ProTrek generation will soon attract other people’s eyes. Read Full Review →

Other ProTrek PRT Watches *similar by price and functions but different by cases

These are not all ProTrek PRT Series. Here is a list of All ProTrek PRT Watches →

PRT-B50 Comparison Table with similar ProTrek Watches

	PRT-B70	PRT-B50	PRW-70
Price (Amazon)	160$	150$	600$
Year of first Release	2020	2019	2020
Accuracy	Bluetooth (via phone app)	Bluetooth (via phone app)	Radio-controlled (via atomic watch signals)
SmartWatch Features	ProTrek Connected App	ProTrek Connected App	No
STN LCD (more distinct and bigger digits)	No	No	No
Cross-Frame Structure (disperses impacts, reinforcing the case’s)	No	No	No
Moon Data (good for fishing and tides)	Yes	No	Yes
Light	Double LED light (Auto LED light, Super illuminator)	Double LED light (Auto LED light, Super illuminator)	Neobright and Double LED light
Case / bezel material	Resin / Aluminum	Resin	Resin/Stainless Steel
Glass	Mineral Glass	Mineral glass	Inorganic glass
Battery	2 years on CR2025	2 years on CR2025	Solar powered
Size (mm) *we consider 48.9×42.8×13.4 to be a traditional watch size (as in DW-5600). So you are to compare how far or close the watch is to this size	57.5×50.8×16.8mm	57.5×50.8×15.8mm	51.1×49.9×14.5mm
Full features (if you want to know more)	PRT-B70 Wiki	PRT-B50 Wiki	PRW-70 Wiki

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Enjoy Japanese approaches to Travel and Functional ProTrek Watches!

ProTrek Philosophy.
Every adventure needs a reliable partner. PRO TREK is exactly the kind of watch that you need to meet the demands of your interests. PRO TREK is equipped with functions such as solar power operation, a digital compass, an altimeter, a barometer and a thermometer. The combination of innovative technology, a robust precision movement and state-of-the-art design makes the PRO TREK the perfect companion for all adventures under the open sky. Mountain or valley? Forest or meadow? River or lake? No matter what awaits you, you will be well-prepared to make any rough terrain your own thanks to the PRO TREK.
Experience for yourself how PRO TREK opens up new horizons while always pointing you in the right direction!

Step Count.
(A built-in 3-axis acceleration sensor begins counting steps the moment you start to walk.
0 to 999,999 step count display range.
Power Saving: Auto sensor sleep state entry after fixed period of non-activity)

Triple Sensor. PRO TREK watches are equipped with the latest Triple Sensor, version 3 technology, making them even more accurate than before. Three highly sensitive, extremely small sensors measure with absolute precision and instantly display changes in your environment. The precision of the digital compass, altimeter, barometer and thermometer is only possible with the Triple Sensor technology. At the same time, the three layer sensor is 95% smaller and consumes 90% less energy than before.

Altimeter. For all those who set their sights high
The built-in altimeter uses a pressure sensor to measure the current air pressure.
The measured air pressure is then used to provide an “estimate” of the current altitude.
The electronic mechanism in the watch is pre-programmed with “ISA values” (“International Standard Atmosphere”) used to convert pressure values into altitude values.
The air pressure and temperature generally become lower as the altitude increases.
These values define the connection between altitude, air pressure and temperature.

Barometer. The barometer measures the air pressures and displays tendencies in the weather.
The higher a person goes (ascent/terrain), the lower the barometric pressure will be.
An increase in air pressure usually signifies an improvement in the weather.
A decrease in air pressure usually means that bad weather is on its way.
The air pressure is displayed with an accuracy of 1 hPa (hectopascals).
The barometer can measure and display a range from 260 hPa to 1100 hPa.

Digital Compass.
The PRO TREK digital compass shows 16 compass points. The direction of magnetic north and the bearing are calculated by the compass’s directional sensor The directional sensor consists of two rectangular coils that detect slight tensions created by the earth’s magnetic field. Depending on the position and direction, these tensions vary in intensity. There is a non-magnetic resistance between the two coils, which absorbs the subtle changes in tension. With each new position, the values that are measured by the resistance change. A microprocessor converts the measurements so that they can be displayed clearly on your watch.

Thermometer. The thermometer is used to measure the outside temperature.
The temperature is displayed with an accuracy of 0.1 °C.
The thermometer can measure and display a range from -10.0°C to 60.0°C.

WATERTIGHTNESS.
The watertightness of the CASIO watches complies with DIN 8310 and ISO 22810. These standards describe the various classes of watertightness and the test procedure used to determine watertightness.
These standards apply to the general wristwatch usage. Watches with metre indications for watertightness cannot be used immediately in this water depth, however, as water resistance metre indications are merely a pictorial representation of the test pressure. A wristwatch withstands the impact of water at the static pressure specified on the watch (e.g. 10 bar) and the theoretical immersion in water to the specified depth.

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