CASIO · JAPANESE-MARKET REFERENCE

PRG-340B-3JF

Name: PRG-340B-3JF
Brand: CASIO
SKU: PRG-340B-3JF
Price: 33676.0 JPY
Availability: OutOfStock

¥33,676 JPY

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CASIO PRG-340B-3JF is a Japanese-market reference. The resin / bio-based resin case and bezel are paired with a flame-retardant cloth band (castlon®). Tough Solar (solar charging system). Features include world time. Listed water resistance: 10-bar water resistance.

Reference: PRG-340B-3JF
Case (H × W × D): 54.7 × 51.7 × 15.1 mm
Weight: 55 g
Listed water resistance: 10-bar water resistance

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Before & after your purchase

Read our shipping and return information before ordering. Model-specific warranty and repair guidance is available below.

Buying from Japan Size & function guide

Setup & support

Model reference: PRG-340B-3JF

Search the official manual using this model or the module number on your watch.

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Warranty & service

Local warranty service outside Japan is not guaranteed. Read our return and repair policy and ask about your exact reference before ordering.

Bracelet fit & adjustments

Check the case dimensions and band details in the specifications. Ask us about fit, included links and adjustment options before placing an order.

Packaging & included items

Included items can vary by reference. Contact us with the model number to confirm the box, documents and accessories.

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Product details

Model: PRG-340B-3JF
JAN / EAN: 4549526396786
Intended use: Unisex wristwatch
Band material: Flame-retardant cloth band (CASTLON®)
Crystal material: Mineral glass
Weight: 55 g
Case size (L × W × H): 54.7 × 51.7 × 15.1 mm
Price: ¥33,676 JPY
Country of origin: JP

Specifications

Release date	February 2025
Japan MSRP	Japan MSRP: ¥31,900 (including Japanese tax)
Case size (H × W × D)	54.7 × 51.7 × 15.1 mm
Weight	55 g
Case and bezel material	Resin / bio-based resin
Band	Flame-retardant cloth band (CASTLON®)
Water resistance	10-bar water resistance
Power supply and battery life	Tough Solar (solar charging system)
Sensors	Altimeter (relative altitude): −700 to 10,000 m; up to 30 manual records (month, day, time, altitude); automatic maximum / minimum altitude and cumulative ascent / descent records; 14 trek records (maximum / minimum altitude and cumulative ascent / descent); altitude differential measurement (−3,000 to 3,000 m); measurement interval of 5 seconds / 2 minutes, with 1-second measurements during the first 3 minutes. Barometer: 260–1,100 hPa; 42-hour pressure trend graph; pressure differential graphic; pressure change alerts using arrows and sound. Compass: 16 directions, bearing angle (0–359°), 60-second continuous measurement, graphic display of north / south / east / west, bearing memory (1 angle and stored-direction graphic), magnetic declination correction, bearing calibration. Thermometer: −10 to 60°C
Environmental resistance	Low-temperature resistance (−10°C)

Exterior details

Glass	Mineral glass
Compatible wrist size	145–215mm
Bezel	Compass bezel

Watch functions

World time	World time: 48 cities (31 time zones, daylight saving on/off) plus UTC (Coordinated Universal Time)
Stopwatch	Stopwatch: 1/10 second, 1,000-hour capacity, split time
Timer	Countdown timer: 1-minute setting increments, maximum 24 hours, 1-second measurement
Alarm	5 daily alarms (1 with snooze) and hourly time signal
Light	LED backlight: full auto light, Super Illuminator, afterglow, selectable illumination duration (1.5 seconds / 3 seconds)
Light color	LED: white
Calendar	Full auto-calendar
Power saving	Power saving: turns off the display after a period in the dark
Battery indicator and alerts	Battery level indicator
Operating time	Operating time from a full charge without further solar charging
With normal functions in use: approximately 7 months
In power-saving mode: approximately 27 months
Accuracy	Accuracy: ±15 seconds per month
Other features	12/24-hour format; duplex LCD
Button operation tone	Button operation tone on/off
Sunrise and sunset	Sunrise / sunset time display
Sensor notes	The altimeter measures relative altitude by converting changes in air pressure.
Weather-related pressure changes also change the altitude reading.
To measure air temperature, remove the watch from your wrist and avoid the effects of body heat, perspiration (water droplets), and direct sunlight.