The lower profile is a result of a newly designed module that is smaller with less components, combined with a high-density mounting with a flatter layout. With two analog hands, the Tough Solar-powered GST-B400 also consumes 55.7% less power than the GST-B200, and this allows for a new dial design with a metallic texture. For the GST-B400AD and GST-B400BD models, the dial is treated with a multilayer vapor deposition to create a vividly colored dial. The complicated dial gives the watch its distinctive utilitarian appearance. The watch features a digital display. The watch is equipped with energy-saving Bluetooth® technology, which offers power-saving data transfer at the push of a button. The watch can connect to a smartphone wirelessly via Bluetooth®, enabling access to a wide range of useful functions. Powered by any light source, saving time and money as no battery change required- known as TOUGH SOLAR

The daily alarm reminds you about recurring events with an acoustic signal at the time you have set. This model has 5 independent alarms for flexible reminders of important appointments.In terms of design, the number of button guards has been reduced as much as possible, enabling the use of large stainless steel buttons that are slim yet easy to operate. A luminous coating provides long-term illumination in the dark after only a short exposure to light.

Measuring Capacity: 24 hours, Measuring Mode: Elapsed time, Measuring Unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) After the Alert: The following operations are stopped to save power: all hand movement (excluding the day indicator), Bluetooth connection, if applicable, and alarms Daily Alarms: Each will sound every day at the time you set, Hourly time signal: The watch beeps every hour on the hour The GST-B400 is a Carbon Core Guard model like the GST-B200 and GST-B300. The full dimensions are 46.6 x 49.6 x 12.9 millimeters. The GST-B400-1A with resin band weighs approximately 80 grams, and the other models with a stainless steel band weigh approximately 160 grams.The GST-B400 is made possible by even further miniaturization of its parts and thinning of its modules without sacrificing any Bluetooth or solar function. Power consumption has also been significantly reduced.

And there’s more good news. The movement has an approximate operating time of seven months on the rechargeable battery. And it’s accurate ±15 seconds per month when there’s no mobile link function and it has to work all by itself. When connected with the phone, it uses automatic time adjustment, and it runs spot-on. The movement will also last for 18 months on its rechargeable battery when it’s “hibernating” in total darkness with the power save function on after a full charge. Watch sizing can only be generally carried out on watches with metal bracelets, steel, titanium, gold, etc. The 49.6 mm case of the watch is made of stainless steel. The bezel of the model is made of stainless steel.Casio’s G-STEEL can be wirelessly connected to yoursmartphone via Bluetooth, which enables access to a wide range of useful functions The top bezel has been given five different finishes, while the middle bezel has been given four different finishes, which creates an elegant effect and changes the appearance of the texture of the metal depending on the viewing angle. The combination of stainless steel and carbon fiber reinforced resin supports the stability of the watch and provides a better wearing comfort. Dual Illuminator: Separate illumination of the analogue and digital components ensures optimum readability in low light conditions., LED light, Selectable illumination duration (1.5 seconds or 3 seconds), With afterglow