Hailing from the G-rescue series is the GW7900B-1 G-Shock Black Solar Sport Watch from Casio.
With multi-functional capabilities, this watch has achieved the feat of enabling its user to fuse business with their day to day active lifestyle.
This watch is surprisingly light, weighing just 71g makes it almost negligible when worn. And although it’s a bang for your buck purchase, it carries features like a negative display that is both stealthy and slick looking while staying consistent with the military style watch along with durability that the G-Shock line is famous for.
- Solar charging capability
- Japanese Quartz Movement
- Scratch resistant glass face
- Atomic timekeeping
- Water resistance rated at 200 meters
- Oversized design may prove too big for some
- Atomic time keeping may not be applicable in some countries
The chassis and bezel are made from ultra durable black resin which gives the watch a sleek look and adds to the overall sophistication of the watch. The accent added by the large four silver screws on the underside of the watch and top of its bezel is perfectly complimented by the definition of white prints stating the function of each of the four buttons on top.
On the face there are five sub dials that displays date, time, and interestingly a tide chart for those who are boating fanatics. The buttons are easy to push to navigate through the settings and functions.
The wristband also uses black resin which is equipped with a silver buckle that provides a surprisingly snug fit.
The GW7900B-1 G-Shock Black Solar Sport Watch is rated up to 200 meters (660 feet) of water resistance, uses the Japanese Quartz for its movement and imbues the ever reliable “shock resistant technology” that the G-shock line of watches are famous for.
At a glance, the Casio GW7900B-1 already sounds very interesting with its product design and nifty features. But let’s go into a little deeper overview of the various function this beast has to offer.
Multi-Band Atomic Timekeeping
The watch will automatically self-adjust relying on the atomic time which is sent via radio signal to your watch. This feature being multi-band means its application extends in five different countries – UK, US, Japan, Germany, and China.
One thing to remember however, is that this is not a GPS watch which means that you are responsible for setting the correct time zone to the proper region or country you are in. The frequency of the signal received is roughly up to 6 times daily (for China the signal is sent up to 5 times per day).
The designated frequency channel per country is WWVB for US, MSF for UK, DCF77 for Germany, for Japan it is 40/60kkHz. For other areas not included in the five countries, you can manually calibrate the watch to the standard time in that specific area.
Renewable Perpetual Energy via Solar Power
The ability to harness solar power and be able to derive months of continuous power is one of the strongest attribute of the GW7900B-1. This process employs the use of solar panels located on the face of the watch to gather light from various sources and to store them as electrical energy in its power cells.
The advantage of this technology is that it doesn’t necessarily have to be direct sunlight – any light source will do like placing under your desk lamp or the living room light, but direct sunlight charge enables your watch to get fully charged faster than indoor lights.
The holding capacity of the power cells is about 270 days (or 9 months). Using an ordinary table lamp would require around 210 hours of charging whereas under direct sunlight it is definitely shortened to about 35 hours.
But one thing is for sure, because of the perpetual recharge capacity of the solar cells, you will never have to buy and replace battery cells for your watch ever again.
One of the attribute that makes the GW7900B-1 watch is its shock resistance. By definition, shock resistance means that the quartz module for timekeeping has 10 layers of protective shield, which includes a rubber bumper made of urethane, the case made of stainless steel, the crystal made of mineral glass which is hardened, and a floating module which comprises of the quartz mechanism floating free in a foam cradle made of urethane, with flexible cables connecting the LCD and outer buttons.
This literally makes the timepiece impervious to damage from sudden shocks caused by bumps and accidental dropping. This feature defines the totality of the existence of G-shock watches – take them anywhere, use them any way, even bring them to the depths of the abyss – they are sure to come back in one piece and sound your alarm for the next day.
The G Shock GW7900B-1 is rated at 200 meters (660 feet). A water resistant watch means that it is protected from moisture or immersion in water for 5 minutes under 15 pounds per square inch of atmospheric pressure and is extended for an additional five minutes under 35 pounds per square inch of atmospheric pressure preventing moisture entrance. This feature means that you can literally go swimming wearing your watch, get caught in the rain, or take a shower without worrying that the innards of your watch will get ruined by moisture getting in.
Fully Automatic Backlight with After Glow
Visibility anytime, anywhere. The warm blue glow that this watch emits just gives this baby enough visibility in dark areas with being overly glaring. You can also set it to light up automatically when tilted to your preference.
Moon Graph Display
This function provides you the knowledge of the phase of the moon. It gains its reference on the view of the moon’s left side on the Earth’s northern hemisphere which is the meridian Transit. This feature can be of great use at times that you are planning outdoor activities and would need the brilliance of the moon.
Tide Graph Display with date and time indicator
The GW7900B-1 G-Shock Black Solar Sport Watch is equipped with a tide graph display and is very useful for ocean activities like fishing, surfing, kayaking, boating, camping, and beach combing. It gives you the tide level now as well as in a defined point in the in the immediate future.
World Time Display
Imagine travelling various parts of the world and still have accurate time! The GW7900B-1 G-Shock watch has been endowed with 31 different time zones in its settings which will display the accurate time in each city you are in. Combined with atomic timekeeping, this watch will assure that you will always be on time regardless of wherever you may be.
Battery Life Indicator and Power Saver Function
This feature enables the GW7900B-1 to automatically enter a deep sleep mode when it senses that the user is in a poorly illuminated or dark room to save energy. The battery meter is located on the display screen which tells the user the amount of battery life.
There are two types of sleep functions. The first is the “display sleep” which turns the display off while all the functions continue working, lasting for about 60 – 70 minutes. The second type is the “function sleep” which renders all the additional function disabled but the standard time keeping function keeps working.
Having this feature means that the GW7900B-1 can survive through a whole week without having to charge and still function at its most basic capacity which is to tell time.
Another beauty of this feature is the elimination of the need for battery replacement, in which Casio says that the GW7900B-1 will be able to go through a period of 20 years without every needing a cell replacement. A very eco-friendly and practical feature that have advanced the GW7900B-1 from its predecessor which only have a standard 5-year battery lifespan.
Basic Casio Features
This G-Shock watch has 4 programmable daily alarm and a snooze alarm. It has a countdown timer, and a stop watch. The built in calendar has been pre-programmed up to 2099. The time format can be set in either 12 or 24 hour format.
All these basic features plus the above mentioned capabilities truly makes the Casio GW7900B-1 G-Shock Black Solar Sport Watch a worthy companion to the average fellow who wants to put their own stamp it today’s modern time.