The case material is made of carbon fiber fine resin that exhibits high rigidity that exceeds the resin concept while being lightweight. - Protects modules placed inside by preventing damage and deformation due to impact - In addition the size of the GST-B100 series has been reduced * and the wearing feeling has been improved while being a dynamic wide face. - In terms of design high functionality and design are achieved through the use of digital reversal liquid crystal. - Finished with a tough design that creates a powerful expression - It is the emergence of a model that combines a new impact-resistant structure and design that will be the next generation standard of G-SHOCK* Compared with the GST-B100 series 12-6H: -5.9mm 3-9H: -4.6mm succeeded in miniaturization* Installation of the dedicated app G-SHOCK Connected is required to connect to a smartphone. - Compatible with our specified i - Phone and Android smartphone* GST-B200 GST-B200B and GST-B200D are certified by the Japanese Radio Law. ・ Shock-resistant structure ・ Tough solar (solar charging system) ・ 20 standard atmosphere waterproofing function ・ Mobile link function (function linked by Bluetooth communication with compatible mobile phones) ・ Needle retraction function (If the needle overlaps the LCD display and is difficult to see the needle can be temporarily retracted from the LCD display.) ・ World time: 39 cities (39 time zones daylight saving time automatic setting function) + UTC (universal coordinated time)..