- Quartz movement
- 48.5 × 45.4 × 13.2 mm case
- 200-m water resistance water resistant
Black Friday · Through November 30
Extra 10% off all watches
Use the code at checkout on every watch, sale prices included.
Code
WATCH10
Online only, through November 30, 2026 at 11:59 pm PT. One discount code per watch.
G-Shock - Brand New
G-Shock GA-2100 Tone-on-Tone Light Blue - GA-2100PT-2A
Sale price
$96.00
Regular price
$120.00
Sold out
Shipping calculated at checkout.
About this timepiece
Monochrome done right, the G-SHOCK GA-2100 Tone-on-Tone (ref. GA-2100PT-2A) dresses its case, dial and band in a single sleek shade of matte light blue. The result pairs a timeless feel with a modern edge, the kind of watch that quietly draws the eye. A carbon fiber insert brings lightweight durability to the shock-resistant build, and Casio lists it as slim and comfortable to wear.
The 48.5 × 45.4 mm case weighs 53 g, and its Carbon Core Guard structure and 200-meter water resistance keep it ready for an active day. Five daily alarms, world time for 48 cities plus UTC, a 1/100-second stopwatch and a countdown timer of up to 24 hours manage the schedule, while a double LED with afterglow lights both the face and the digital display. Two hands and a day dial work together with the digital readout, the hand shift feature keeps it clear, and two SR726W batteries run for approximately three years.
Features
- Matte light blue tone-on-tone – case, dial and band in one monochrome light blue.
- Carbon fiber insert – the Carbon Core Guard structure gives a light and strong build.
- Slim, comfortable fit – Casio rates it slim and comfortable to wear, with a compatible band size of 145 to 215 mm.
- Double LED light – Super Illuminator LEDs for the face and the digital display, with afterglow.
- Five daily alarms – plus world time, a 1/100-second stopwatch and a 24-hour countdown timer.
Specifications
- Reference: GA-2100PT-2A
- Collection: 2100 Series
- Gender: Men's
- Movement: Quartz
- Module: 5611
- Display: Analog-digital
- Case Size: 48.5 × 45.4 × 13.2 mm
- Weight: 53 g
- Case and Bezel Material: Carbon / Resin
- Band: Resin band; compatible band size 145 to 215 mm
- Construction: Shock resistant; Carbon Core Guard structure
- Water Resistance: 200-meter water resistance (20 bar)
- Glass: Mineral glass
- Power Supply: Approx. battery life: 3 years on SR726W × 2
- World Time: 31 time zones (48 cities + coordinated universal time); daylight saving on/off
- 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, split time, 1st-2nd place times
- Timer: Countdown timer; measuring unit 1 second; countdown range 24 hours; countdown start time setting range 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)
- Alarms: 5 daily alarms; hourly time signal
- Light: Double LED light, white: 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)
- Calendar: Full auto-calendar (to year 2099)
- Accuracy: ±15 seconds per month
- Hands / Display Details: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day); digital: hour, minute, second, pm, month, date; hand shift feature (hands move out of the way to provide an unobstructed view of digital display contents)
- Other Features: 12/24-hour format; button operation tone on/off; Neobrite
Timepiece History
G-SHOCK began with a developer's belief that a watch could be built not to break when dropped, and Project Team Tough was formed in 1981 to make it, working from Kikuo Ibe's concept. Over about two years the team built more than 200 prototypes around the "Triple 10" concept: 10-bar water resistance, surviving a 10-meter drop, and a 10-year battery. The DW-5000C that came out of that work debuted in 1983 with a hollow case that supports the core module at certain points, and G-SHOCK has kept building on that toughness idea ever since.
G-SHOCK launched the 2100 series in 2019 with the GA-2100, whose design concept is inherited from the DW-5000C and whose octagonal bezel carries a motif kept since the very first G-SHOCK. That first GA-2100 introduced the Carbon Core Guard structure, which uses carbon fiber-reinforced resin to strengthen the case from within. Casio presents the Tone-on-Tone models as a match for the monochromatic color schemes popular in current fashion.
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Payment options
Pay over time with Shop Pay, PayPal, or lease-to-own.
See all financing options, including Synchrony Luxury in storeShop Pay Installments Split your purchase into installments
| Plan | Payment | Est. APR | Total |
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At checkout, choose Shop Pay, then Pay in installments. You'll see your exact plan before you confirm.
PayPal Pay Later Pay in 4 or Pay Monthly
| Plan | Payment | Est. APR | Total |
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At checkout, choose PayPal, then Pay Later. PayPal shows your exact plan before you confirm.
Lease-to-own · Acima or Progressive No credit needed* · 90-day purchase option
Lease-to-own is not a loan or credit, so there's no APR. Your payment amount and schedule are set in your lease agreement and depend on your state and pay schedule. The lowest-cost way to own is the 90-day purchase option.
Acima Leasing
- Approvals up to $5,000
- 90-day early purchase option (3 months in CA)
- Own in 12, 18 or 24 months
- Payments set around your payday
Progressive Leasing
- No credit needed*
- 90-day purchase option (3 months in CA)
- 12 months to ownership
- Weekly, bi-weekly or monthly payments
Apply above to see your approval amount, or choose Acima or Progressive Leasing at checkout to apply and sign your lease in minutes. Questions? Call us at 661-861-8414.
Estimates & disclosures
Estimates are based on the item price shown, before tax, shipping and any personalization charges, and use the same estimated rates each provider shows in its own payment estimates. Your actual plan, rate and payments are set by the provider when you apply. All options are subject to an eligibility check and approval.
Shop Pay Installments: Rates from 0–36% APR. Payment options through Shop Pay Installments are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. State notices to consumers: affirm.com/licenses.
PayPal Pay Later: Pay in 4 is interest-free and available for eligible purchases of $30–$1,500. Pay Monthly is an interest-bearing installment loan issued by WebBank for eligible purchases of $49–$10,000, with terms of 3 to 24 months depending on purchase amount and a fixed APR of 0%–35.99% based on creditworthiness. Subject to consumer credit approval. Pay Monthly is currently not available to residents of AK, CT, HI or WA. Pay in 4 is currently not available to residents of MO. See PayPal terms.
*No credit needed: lease providers may obtain information from consumer reporting agencies. Not all applicants are approved.
Acima: The advertised transaction is a rental-purchase agreement (rent-to-own agreement, consumer rental-purchase agreement or a lease/lease-purchase agreement, depending on your state) with Acima. Ownership is optional. You will not own the merchandise until the total amount necessary to acquire ownership is paid in full or you exercise your early purchase option. Acquiring ownership by leasing costs more than the retailer's cash price. "Approvals up to $5,000" refers to the maximum amount Acima will spend to acquire goods from a retailer for lease to you. Not available in MN, NJ, WI or WY.
Progressive Leasing: The advertised service is lease-to-own or a rental- or lease-purchase agreement provided by Prog Leasing, LLC, or its affiliates. Acquiring ownership by leasing costs more than the retailer's cash price. No credit needed: Progressive Leasing obtains information from credit bureaus. Not all applicants are approved. Standard agreement offers 12 months to ownership. 90-day purchase options cost more than the retailer's cash price (except 3-month option in CA). Not available in MN, NJ, VT, WI or WY.
Care Instructions
Daily Care
• Wipe the case and bracelet with a soft microfiber cloth after wear to remove oils, dust, and fingerprints.
Cleaning
• Use a soft cloth lightly dampened with water and mild soap for occasional cleaning.
• Dry the watch thoroughly with a clean, soft cloth.
What to Avoid
• Avoid bleach, chlorine, harsh chemicals, abrasive cleaners, and household cleaning products.
• Do not use polishing compounds unless specifically recommended by the watch manufacturer.
Stainless Steel and Titanium
• Light surface marks may develop over time with normal wear.
• Titanium can show cosmetic marks differently than stainless steel because of its lighter weight and surface characteristics.
Water Resistance
• Always follow the water resistance rating listed by the manufacturer for your specific watch.
• Water resistance is not permanent and can decrease over time as seals and gaskets age.
• Make sure the crown is fully pushed in or screwed down before water exposure.
• Do not operate the crown, pushers, or other controls while the watch is underwater unless the manufacturer specifically states that it is safe to do so.
• Avoid hot tubs, saunas, and very hot showers, as heat and rapid temperature changes can affect the watch seals.
• Have the water resistance checked periodically, especially after battery replacement, case opening, or service.
Storage
• Store your watch in a clean, dry place when not in use.
• Keep it separated from other jewelry or watches to help prevent scratches.
