Casio Digital Watch Vintage Series Unisex Silver Overseas Model [Casio] B640WD-1AV [Goods]

[Size] Case size (length x width x thickness): 38.9 x 35 x 9.4 (approx. mm), belt: width approx. 15 (buckle side) ~ 20 (case side) mm, lug width approx. 18 mm, band attachable size: 135 ~ 200 mm, weight: approx. 49 g [Material] Case: Resin, Band: Stainless Steel, Windshield: Resin Glass [Waterproof performance] 5 ATM water resistant [Accessories] Japanese manual (copy), foreign language manual booklet, plain general-purpose box (not a Casio box) [Band size adjustment method] Free slide type (separate tool required) [Clock function] ●Stopwatch (1/100 second, 24 hour meter, with split) ●Timer (setting unit: 1 second, maximum setting: 24 hours, measurement in 1/10 second increments, time up sound 10 seconds) ●Time alarm/time signal ●LED light (with afterglow function), emitting color: amber ●Full automatic calendar ●12/24 time display switching ●Accuracy: Average monthly difference ±30 seconds ●Battery life: Approximately 3 years (value when replacing with a new battery.The battery pre-installed in the watch is a monitor battery to check the functions and performance of the watch, so the battery life will be shortened.)