Module No. 5678



±15 seconds per month average when time adjustment using signal reception is not possible.

Basic Functions:


Hour, minute (moves every 10 seconds), second


Hour, minute, second, month, day, day of the week

Barometric pressure graph

a.m. (A)/p.m. (P)/24-hour timekeeping

Full Auto Calendar (2000 to 2099)

Signal Receive Functions:

Auto receive, manual receive

Last receive date and time display

Auto summer time switching

Auto transmitter selection (for JJY, MSF/DCF77)

Receivable call signs:
JJY (40 kHz/60 kHz), WWVB (60 kHz), MSF (60 kHz), DCF77 (77.5 kHz), BPC (68.5 kHz)

Auto Receive enable/disable

Digital Compass:

Measurement range: 0° to 359°

Measurement Units: LCD: 1°, Analog: 6°

16-direction display

Continuous Bearing Measurement (1 minute)

North Indication Hand

Compass calibration (2-point calibration, magnetic declination angle)

Altimeter (relative altitude):

Measuring range: -700 to 10,000 m (or -2,300 to 32,800 ft.)

Display range: -3,000 to 10,000 m (or -9,840 to 32,800 ft.)

(Altitude calibration can be used to display any 10,700 m within the range above.)

Measuring unit: 1 m (or 5 ft.)

Auto measurement interval (2 minutes, 5 seconds)

Altitude calibration

Altitude graph

Altitude differential measurement (-100 to +100 m/-1,000 to +1,000 m (or -325 to +325 ft./-3,280 to +3,280 ft.))

Altitude Memory

Manually Recorded Data

One-press recording of altitude, date (year, month, day), and time. Up to 30 records.

Auto Record Data

One record of high altitude, low altitude, cumulative ascent, cumulative descent


Measurement range: 260 to 1,100 hPa (or 7.65 to 32.45 inHg)

Display range: 260 to 1,100 hPa (or 7.65 to 32.45 inHg)

Measurement unit: 1 hPa (or 0.05 inHg)

Barometric pressure adjustment

Barometric pressure graph

Barometric pressure differential indicator

Barometric pressure change indications


Measuring range: -10.0 to 60.0 °C (or 14.0 to 140.0 °F)

Display range: -10.0 to 60.0 °C (or 14.0 to 140.0 °F)

Measuring unit: 0.1 °C (or 0.2 °F)

Temperature Correction

Sensor Accuracy:

Direction sensor

Measurement accuracy: Within ±10°

(Guaranteed accuracy temperature range: 10 °C to 40 °C (50 °F to 104 °F))

Bearing hand indication: Within ±2 gradations

Pressure sensor

Measurement accuracy: Within ±3 hPa (0.1 inHg)

(Altimeter measurement accuracy: Within ±75 m (246 ft.))

Guaranteed accuracy temperature range: -10 °C to 40 °C (14 °F to 104 °F)

Strong impact or prolonged exposure to temperature extremes may negatively affect accuracy.

Temperature Sensor

Measurement accuracy: Within ±2 °C (3.6 °F)

(Guaranteed accuracy temperature range: -10 °C to 60 °C (14 °F to 140 °F))


Measuring unit: 1/100 second

Measuring range:

23 hours, 59 minutes, 59.99 seconds (24 hours)

Measurement Functions:

Elapsed time, cumulative time, split times, 1st and 2nd place finisher times


Setting unit: 1 minute

Measuring range: 60 minutes

Countdown unit: 1 second

Time up alert duration: 10 seconds


Time alarms

Number of alarms: 5

Setting units: Hours, minutes

Alarm tone duration: 10 seconds

Hourly time signal: Beep every hour on the hour

World Time:

Current time in 29 cities (29 time zones), and UTC (Coordinated Universal Time) time

Summer time

City swapping

One-touch UTC display


Double LED light: LED light for dial and LED backlight for LCD (with Full Auto Light, Super Illuminator, afterglow, afterglow duration setting (1.5 seconds, 3 seconds)); alarm testing; automatic hand position correction; power saving; charge level (battery) indicator; operation tone enable/disable; hand shift

Power Supply:

Solar panel and one rechargeable battery

Battery operating time: Approximately 6 months


Illumination: 1.5 seconds/day

Beeper: 10 seconds/day

Digital Compass Operations: 20 times/month

Mountain climbing: Once/month (Altitude readings: Approximately 1 hour; Barometric pressure change indication measurements: Approximately 24 hours)

Barometric Pressure Graph: Measurement every 2 hours

Time signal reception: 4 minutes/day

Display: 18 hours/day

Specifications are subject to change without notice.