Precise Long-time Service: The wrist watch made of superior Japanese Quartz Movement and Maxell SR920SW Battery,the life of each battery is ★more than 2 years★ and it’s replaceable by using the watchmaker tools.BTW,you don’t have to calibrate it like a mechanical watch. Creative Design: The brand name “Vigor Rigger” is meaningful and rich,as per show the meaning of the wrist watch,we select the light metal,the shinny metalic pin and slim leather watch band, simple design,it’s expected to show the owner is competent and eye-catching.