Casio Digital Watch Vintage Series B640WB-1A Black

[Watch Functions] Stopwatch (1/100 second, 24-hour counter, with split function) Timer (set unit: 1 second, maximum set: 24 hours, measures in 1/10 second units, alarm sound for 10 seconds) Time alarm/time signal LED light (with afterglow function), emission color: amber Full auto-calendar 12/24 hour display switching Accuracy: average monthly difference of 30 seconds Battery life: approximately 3 years (value when battery is replaced with a new one; the pre-installed battery has a shorter lifespan as it is used for checking the watch’s functions and performance)

・[Size] Case size (height 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 fitting size: 135 ~ 200 mm, Weight: approx. 49 g ・[Material] Case: resin, Band: stainless steel, Windshield: resin glass ・[Water Resistance] 5 ATM water resistance ・[Included Accessories] Japanese instruction manual (copy), foreign language instruction booklet, plain generic box (not a [Casio] box) ・[Band Size Adjustment Method] Free slide type (separate tools required) ・Clasp type: Slide clasp

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.

【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary.

【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device's requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product.

【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.