Shock resistant

200m water resistant

Solar powered

LED light (Super Illuminator)

Afterglow

Mobile link (Wireless linking using Bluetooth)

Dual time (Home city time swapping)

1-second stopwatch
Measuring capacity: 23:59'59
Measuring mode: split time

Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)

Daily alarm

Battery level indicator

Power Saving (hands stop to save power when the watch is left in the dark)

Full auto-calendar (to year 2099)

Date display

Day indicator

Regular timekeeping
Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)
Accuracy: ±15 seconds per month (with no mobile link function)

Approx. battery operating time:
5 months on rechargeable battery (operation period with normal use without exposure to light after charge)
24 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
module 5513

Size of case / total weight
GST-B100 58.1 x 53.8 x 14.1 mm / 101 g