Unlike mechanical watches, the is low maintenance but not "no maintenance."
Because this movement is complex, operating it requires a specific sequence of button pushes and crown rotations. If you try to set it without the logic, you risk misaligning the hands or damaging the gears. citizen eco drive gn-4w-s-12g manual
While this guide is comprehensive, you may want the official Citizen booklet. Because the is a specific reference number, Citizen often groups it under a series number (e.g., J810, E820). Unlike mechanical watches, the is low maintenance but