Thank you for viewing. CASIO G-SHOCK GW-2310BD This watch is radio-controlled and solar-powered, so it basically doesn't need time adjustments or battery replacements. I have been regularly solar charging it. There are no extra links for adjustment. The diameter of the wrist circumference is approximately 6.5cm. Operation has been confirmed. The watch will be shipped as the main body only. *Regarding the condition, there are some paint chips on the metal band due to use. Please check the photos carefully before considering a purchase. *This is a used item. Please refrain from purchasing if you are at all concerned. Shipping will be via Yu-Packet Post. Features ・Multi-band 6, which receives standard radio waves from 6 stations worldwide (2 in Japan, China, America, England, and Germany) and corrects the time. ・Tough Solar