This is the Casio PRT-B50YT-1ER Pro Trek Bluetooth watch - full specs below.

It has been worn but is in generally good condition. The most noticeable marks are on the bezel (around the 6 'o clock position) and a light scratch on the strap. I've tried to show these of the photos - to be honest this minor damage looks worse on the photos than it does in real life.

 In full working order.

From a smoke free and pet free home.

Includes original boxes and instructions and tool for adjusting the strap.

Casio Pro-Trek PRT-B50YT-1ER Quad Sensor Connected watch

Watch can connect to your phone using the Casio Protrek App. 

The watch is equipped with a sturdy 50 mm wide resin case in a timeless black color. 

The watch band is crafted from ultra-durable titanium.

GPS navigation, step count, route log etc all available through the mobile Protrek App

Most important features:

Specifications

  • Case size (L× W× H)

    57.5 × 50.8 × 15.8 mm

  • Weight

    96 g

  • Case and bezel material

    Resin

  • Band

    Titanium Band, Stainless Steel Buckle
    One-touch 3-fold Clasp

  • Water resistance

    100-meter water resistance

  • Environmental resistance

    Low-temperature resistant (-10℃/14℉)

  • Power supply and battery life

    Approx. battery life: 2 years on CR2025

  • Sensor feature

    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
    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 (±10 hPa) 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 ±0.1 hPa. *Changeover between hPa and inHg
    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)
    Thermometer Measuring range: -10 to 60℃ (14 to 140℉) Measuring unit: 0.1℃ (0.2℉) *Changeover between Celsius (℃) and Fahrenheit (℉)

  • Smartphone Link feature

    Mobile link (Wireless linking using Bluetooth®)

  • Apps

    CASIO WATCHES

  • Glass

    Mineral Glass

  • Bezel features

    Direction Bezel

  • Surface treatment

    Black ion plated band

  • World time

    World time 38 time zones (38 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping

  • Sunrise/sunset display

    Sunrise, sunset time display Sunrise time and sunset time for specific date

  • Stopwatch

    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

  • Timer

    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)

  • Alarm/hourly time signal

    5 daily alarms
    Hourly time signal

  • Light

    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)

  • Light color

    LED:White
    LED:Neon Illuminator (Blacklight LED)

  • Calendar

    Full auto-calendar (to year 2099)

  • Mute feature

    Button operation tone on/off

  • Accuracy

    Accuracy: ±15 seconds per month (with no mobile link function)

  • Other features

    12/24-hour format
    Hand shift feature
    Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 10 seconds), second) Digital: Hour, minute, second, am/pm, month, date, day