Stainless steel is a durable material. Sapphire Glass with non-reflective coating One-touch 3-fold Clasp Stainless Steel Band Bezel is dark blue ion plated. Modes of measurement: Time elapsed, split time, and times for 1st and 2nd place Indicator of battery life Display of the current date Timekeeping on a regular basis 2 hands (hour, minute), 3 dials, analogue (seconds, stopwatch minutes, stopwatch seconds) Monthly precision: 20 seconds Time to operate from full charge to hands-off: approximately 6 months