200m water resistant
LED light (Super Illuminator)
Mobile link (Wireless linking using Bluetooth)
Dual time (Home city time swapping)
Measuring capacity: 23:59'59
Measuring mode: split time
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)
Battery level indicator
Power Saving (hands stop to save power when the watch is left in the dark)
Full auto-calendar (to year 2099)
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)
Size of case / total weight
GST-B100 58.1 x 53.8 x 14.1 mm / 101 g
We could all use some extra time. If your new, unworn item is not 100% to your satisfaction, you have 30 days from the original ship date to return it. To be eligible for a return, your item must be unused, unworn and in the same condition that you received it. It must also be in the original packaging. More details can be found on our Returns page. Unfortunately SISU and Vestal watches sales are final and not eligible for return.
Warranty periods range from 12 months to lifetime, depending on the brand. All of the brands we carry come with their international manufacturer warranty.* All warranty issues are to be handled directly with the watch manufacturer, so be sure to keep your electronic invoice for proof of purchase from Watches.com as we're an authorized retailer. Contact the brand directly using the information in your warranty booklet or the manufacturer's website for complete warranty terms and repair instructions. Typically the manufacturer's warranty does not cover: battery, crystal, strap or bracelet; damage resulting from improper handling, lack of care, accidents or normal wear and tear; damage from contact with objects; water damage.
*Unfortunately SISU and Vestal watches do not come with an international warranty as they are no longer in business. All sales are final on SISU and Vestal with no returns accepted.