Features: stainless steel case nylon strap solar movement sapphire crystal blue dial analog display tachymeter scale neobrite solar power bluetooth connection code table daily alarm full automatic calendar luminous hands and markers day and date display 12/24 hours display am/pm display accuracy: ± 15 seconds per month pull/push crown solid case back buckle clasp 100m water resistance approximate case diameter: 42mm approximate case thickness: 9mm