Seiko SUR480P Stone Set Two Tone Womens Watch watch case colour@Gold battery operating time: *10 months battery operating time: *10 months on rechargeable battery (operation period with normal use without exposure to light after charge) *23 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Accuracy: ±30 seconds per month 12 24 hour format Calibre G111 Quartz Movement Stainless Steel Case and Bracelet 39mm Case Size Mineral Crystal 50 Meters Water Resistant a metal seiko watch is both fashionable and reliable A seiko watch has quality assurance