G-Shock MTG-B3000 Aurora Rainbow Limited Edition

Immerse yourself in stunning structural and luminous beauty — metal meets resin in a very special textural MT-G timepiece inspired by the aurora borealis. 

The stainless steel bezel is treated first with recrystallization and deep-layer hardening processes, then a rainbow ion-plated (IP) coating is applied for an extraordinary top bezel developed with just this design in mind. Each timepiece is a one-of-a-kind, thanks to the unique differences in crystalline grains*1 and rainbow IP colors.*2 Elaborate finishing takes this timepiece to an entirely other level. The case back, made of stainless steel treated with rainbow IP, is then repolished to remove the coated layer from only the raised portions on the back of the case. The mysteriously beautiful aurora borealis colors are also captured in the new purple hue of the translucent soft urethane band paired with the rose gold-colored ion-plated band loop and purple ion-plated buckle. 

The MTGB3000 design invites you to join the dance of color in the aurora borealis as seen from outer space. *1 The stainless steel is processed into components and then recrystallized, yielding unique differences in crystalline grain that make for subtle differences in pattern, color tone, and luster from part to part. *2 The look of the rainbow ion-plating color will vary from watch to watch. SPECIFICATIONS 

Case size (L× W× H): 51.9 × 50.9 × 12.1 mm 
Weight: 111 g 
Case / bezel material: Carbon / Stainless steel 　
Band: Resin Band 
Construction: TRIPLE G RESIST (Shock resistant, Centrifugal force resistant, Vibration resistant), Carbon Core Guard structure 
Time adjustment: Radio-controlled Watch; Multi band 6
Water resistance: 200-meter water resistance 
Power supply and battery life: Tough Solar (Solar powered)2 
Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®) 
Apps: CASIO WATCHES 
App connectivity feature: Auto time adjustment, Easy watch setting, Approximately 300 world time cities, Time & place, Watch status display, Self check, Phone finder 
Glass: Sapphire crystal with glare-resistant coating 
Crown: Screw Lock Crown 
Surface treatment: Deep Layer Hardening + Ion Plating case 
Other: Neobrite 
Compatible band size: 145 to 215 mm 
World time: Dual time 27 time zones, Home city time swapping, auto summer time (DST) switching 
Stopwatch: 1-second stopwatch Measuring capacity: 23:59'59. Measuring modes: Elapsed time, split time 
Timer: Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-second increments) 
Alarm/hourly time signal: Daily alarm 
Light: LED light (Super Illuminator) Afterglow 
Light color: LED: White 
Hand home position correction feature: The auto hand home position correction 
Energy saving feature: Power Saving (hands stop to save power when the watch is left in the dark) 
Battery display/alert: Battery level indicator 
Run time: Approx. battery operating time: 5 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) 
Time adjustment details: Time calibration signal reception Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful) *5 times a day for the Chinese calibration signal Manual receive The latest signal reception results
Time Calibration Signals Station name: DCF77 (Mainflingen, Germany) Frequency: 77.5 kHz Station name: MSF (Anthorn, England) Frequency: 60.0 kHz Station name: WWVB (Fort Collins, United States) Frequency: 60.0 kHz Station name: JJY (Fukushima, Fukuoka/Saga, Japan) Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga) Station name: BPC (Shangqiu City, Henan Province, China) Frequency: 68.5 kHz 
Calendar: Full auto-calendar (to year 2099) 
Accuracy: ±15 seconds per month (with no signal calibration) 
Other features: Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 5 seconds), second), 3 dials (dual time hour and minute, dual time 24 hour, day)