Features: case/bezel material: stainless steel leather strap solar movement mineral crystal black dial analog display chronograph function tachymeter scale neobrite mobile link dual time 1/20-second stopwatch daily alarm battery level indicator full auto calendar accuracy: ±15 seconds per month luminous hands and indexes day and date display screw down crown screwed case back buckle clasp 100m water resistance approximate size of case : 53.5 × 49.2 × 13.1mm