Smart and stylish, sleek and sophisticated — a GBM-2100 with bold metal bezel that delivers Smartphone Link and Tough Solar charging system, all in the same compact size. Key resin components used in the case and band are made with environmentally responsible bio-based resin. Tough construction and stylish design in a timepiece that takes you from casual settings to business meetings with ease. Details Case Size (L x W x H): 49.3 × 44.4 × 11.9 mm Weight: 72g Case and Bezel Material: Bio-based Resin / Stainless Steel Band: Bio-based Resin Band Construction: Shock Resistant Water Resistance: 200-meter water resistance Power Supply and Battery Life: Tough Solar (Solar Powered) Time Adjustment: Bluetooth: Connects to a smartphone and automatically adjusts the time Exterior Glass: Mineral Glass Compatible Band Size: 145 to 215mm Other: Neobrite Watch Features World Time: 38 time zones (38 cities + coordinated universal time), auto summer time (DST) switching, home city/world time city swapping Stopwatch:  1/100-second stopwatch, Measuring capacity: 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, lap/split time Timer: Countdown timer, Measuring unit: 1 second, Countdown range: 60 mins, Countdown start time setting range: 1 second to 60 mins (1-second increments, 1-minute increments) Alarm/Hourly Time Signal: 5 Daily Alarms, Hourly Time Signal Light: Double LED light, LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow), LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) Light Colour: LED: White Calendar: Full auto-calendar (to year 2099) Accuracy: ±15 seconds per month Other Features: Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.), 12/24-hour format, Date/month display swapping, Day display (days of the week selectable in six languages), Regular timekeeping - Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode) / Digital: Hour, minute, second, pm, month, date, day Mute Feature: Button operation tone on/off Battery Display / Alert: Battery level indicator Run Time: Approx. battery operating time - 7 months on rechargeable battery (operation period with normal use without exposure to light after charge), 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Energy Saving Feature: Power Saving (display goes blank to save power when the watch is left in the dark)