Casio G-SHOCK 2100 Series Dual Display Bluetooth Solar Watch (GA-B2100-1A1ER)

Overview

Upgrade the retro look of the octagonal GA-2100 line with Smartphone Link and Tough Solar power. The GA-B2100-1A1ER maintains the iconic octagonal form while adding Bluetooth connectivity for automatic time adjustment and app-based settings. A Carbon Core Guard structure helps keep the case strong and lightweight, and the double LED Super Illuminator improves visibility in the dark.

Key Features

• Carbon Core Guard structure with shock-resistant construction
• Tough Solar (solar powered)
• Smartphone Link via Bluetooth® (Mobile Link)
• Auto time adjustment and easy watch setting via CASIO WATCHES app
• World time: 38 time zones (38 cities + UTC) with city code/name display, DST and home/world swap
• Double LED light (Super Illuminator) for dial and digital display with afterglow
• 1/100-second stopwatch with lap/split timing
• Countdown timer up to 60 minutes
• 5 daily alarms and hourly time signal
• Power saving mode and battery level indicator
• Hand shift feature for unobstructed digital viewing
• Date/month swap and day display in six selectable languages

Specifications

• Case size (L×W×H): 48.5 × 45.4 × 11.9 mm
• Weight: 52 g
• Colour: Black strap and Black dial
• Casio Part Number: GA-B2100-1A1ER
• Case and bezel material: Carbon / resin
• Band: Resin band
• Construction: Shock resistant; Carbon Core Guard structure
• Water resistance: 200-metre water resistance
• Time adjustment: Bluetooth – connects to a smartphone and automatically adjusts the time
• Power supply: Tough Solar (solar powered)
• Glass: Mineral glass
• Other: Neobrite

Smartphone Link & App Functions

• Mobile Link: Wireless linking using Bluetooth®
• App: CASIO WATCHES
• App features: Auto time adjustment, easy watch setting, approximately 300 world time cities, time & place, reminder, phone finder

Watch Features

• World time: 38 time zones (38 cities + UTC), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, home city/world time city swapping
• Stopwatch: 1/100-second; measuring capacity 00'00''00–59'59''99 (first 60 min), 1:00'00–23:59'59 (after 60 min); measuring unit 1/100 sec (first 60 min), 1 sec (after 60 min); modes: elapsed time, lap/split time
• Timer: Countdown timer; measuring unit 1 second; range 60 minutes; start setting 1 second to 60 minutes (1-second and 1-minute increments)
• Alarm/hourly time signal: 5 daily alarms; hourly time signal
• Light: Double LED light — LED for the face and LED backlight for the digital display (Super Illuminator), selectable 1.5 seconds or 3 seconds, afterglow
• Light colour: LED: White
• Calendar: Full auto-calendar (to year 2099)
• Mute feature: Button operation tone on/off
• Energy saving: Power Saving (display goes blank to save power when left in the dark)
• Battery display/alert: Battery level indicator
• Run time: Approx. 7 months on rechargeable battery (normal use without light after charge); approx. 18 months in total darkness with Power Saving on after full charge
• Accuracy: ±15 seconds per month (with no mobile link function)
• Other: Hand shift feature; 12/24-hour format; date/month display swapping; day display (six languages)
• Regular timekeeping: Analogue: 2 hands (hour, minute; minute hand moves every 20 seconds), 1 dial (battery level, mode). Digital: hour, minute, second, pm, month, date, day

Authorised Casio Retailer

TacTree is an authorised Casio UK retailer. All Casio watches sold are 100% genuine, brand new and supplied directly to us from Casio UK. Each watch is delivered with official Casio packaging, instruction manual and manufacturer warranty, ensuring complete authenticity and peace of mind.