Alba Prestige AS9S29X Data WatchStrapMaterial Silicone battery operating time: *8 months battery operating time: *8 months on rechargeable battery (operation period with normal use without exposure to light after charge) *19 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Accuracy: ±15 seconds per month 12 24 hour format Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents it offers reliability with a 44mm stainless steel case offering protection against water splashes and light rain Equipped with a date display for practicality and a mineral crystal to protect against scratches