Additional Details ------------------------------ Product description: ●Caliber No.: 5X53 ●Drive method: Solar GPS satellite radio wave correction ●Accuracy: Average monthly difference when not receiving ±15 seconds ●Driving period: Approximately 6 months when fully charged, approximately 2 years when power save ●Case material: Titanium ●Band material: titanium ●Glass material: sapphire glass - Lumibrite: Available (hands/index) ●Waterproofing: Reinforced waterproofing for daily life (10 atm) ●Nakadome: One-push three-fold method ●Nakadome with smart adjuster mechanism ●Magnetic resistance: Yes ●Case size: (vertical) 48mm x (width) 42.7mm x (thickness) 12.2mm ●Perpetual calendar function (until February 28, 2100) ●World time function (39 time zones) ●Overcharge prevention function ●Power save function ●Dual time display function ●Day of the week display function ●Time transfer function ●Power reserve display function ●Time zone correction function by GPS satellite radio wave reception, super smart sensor (automatic time correction function), forced time correction function ●Number of captured satellites display function ●Reception result display function ●Reception off function (airplane mode) ●Automatic needle position correction function ●DST (daylight saving time) function ●MADE IN JAPAN