List Price: $170 (MTGM900DA-8)
Size: Medium
Dimensions (L x W x H): 56.8 x 46 x 16.6 mm
Weight:Â 144 grams
Module: 3406 (instruction manual at casio.com)
Battery Type (Lifespan): Solar Rechargeable
Series Launch Year: 2012
Notable Features: Tough Solar, Multi-Band 6, World Time, 1/100-Second Stopwatch, Timer, Full Auto EL Backlight
See full specifications for MTGM900DA-8 under “Additional information” tab above.
Suggested Uses: Office, Outdoors, Travel
MTG-M900 Versus GW-M500
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The MTG-M900 with Tough Solar and Multi-Band 6 features stainless steel bezel parts and a stainless steel band. The silver MTGM900DA-8 is frequently available discounted for around $100 at some retailers in the U.S.

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G-SHOCK
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In stock
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Medium
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56.8 x 46 x 16.6
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144
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200-Meter Water Resistance, Shock Resistant
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Resin
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Resin, Stainless Steel
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Stainless Steel
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Mineral
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Rechargeable
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Tough Solar
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Battery Level Indicator
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Power Save
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Multi-Band 6
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World Time
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31
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48 + UTC
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DST On/Off
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Stopwatch
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1/100 second
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23:59’59.99”
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1st-2nd place times, elapsed time, split time
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Countdown Timer
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1 second
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24 hours
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1 minute to 24 hours
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1 minute
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5 Daily with 1 Snooze
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Hourly Time Signal
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Afterglow (Fixed), EL (Electro Luminescence), Full Auto, LCD Backlight
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Blue Green
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Full Auto Calendar to 2099
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Button Tone On/Off
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12/24-Hour Format
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Alarm
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The G-Shock GW-M500 and GW-M530 are rugged tool watches with Tough Solar power and Multi-Band 6 automatic time correction. In the U.S., the GWM500A-1 and GWM530A-1 are usually available at a discount at some retailers for around $80-$100.

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G-SHOCK
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In stock
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Medium
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56.8 x 46 x 16.6
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67
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200-Meter Water Resistance, Shock Resistant
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Resin
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Resin, Stainless Steel
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Resin
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Mineral
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Rechargeable
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Tough Solar
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Battery Level Indicator
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Power Save
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Multi-Band 6
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World Time
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31
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48 + UTC
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DST On/Off
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Stopwatch
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1/100 second
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23:59’59.99”
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1st-2nd place times, elapsed time, split time
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Countdown Timer
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1 second
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24 hours
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1 minute to 24 hours
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1 minute
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5 Daily with 1 Snooze
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Hourly Time Signal
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1.5 or 3 Second Afterglow, EL (Electro Luminescence), Full Auto, LCD Backlight
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Blue Green
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Full Auto Calendar to 2099
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Button Tone On/Off
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12/24-Hour Format
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Alarm
MTGM900DA-8 on Amazon MTGM900DA-8 at Casio
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Some specs for individual models may differ within a series, such as price, materials, weight, etc. Dollar prices are in U.S. currency unless otherwise noted. Click the link icons in the gallery images for articles on specific models. Gallery images with "(casio.com)" are linked to an official Casio product page. Follow your country's official G-Shock site (gshock.casio.com) for more release information.
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7.8Expert Score
G-Shock MTG-M900 Rating by G-Central
The MTG-M900 serves well as an affordable tool watch
PROS
- Digits are larger than most digital G-Shock models.
- Offers a different style than other solar models.
- Stainless steel parts give it a dressier look.
- Three-fold clasp metal band is easier to put on and remove than a resin band with buckle.
CONS
- Not as popular as other G-Shock styles.
- Heavy compared to the similar GW-M500.