Model Number: KM1-211-30 Drive System: Solar (J800) Case Material: Stainless Steel Belt Material: Calf Leather (Crocodile Embossed) Crystal: Crystal Glass Dial Color: Gold Belt Color: Brown Size (H x W x D): Approximately 43 x 38 x 10mm Lug Width: Approximately 20mm Buckle Width: Approximately 16mm Wrist Size: Approximately 15.5-20cm Weight: Approximately 49g Specifications: Water Resistance: 10 ATM (for daily life) Accuracy: ±15 seconds per month on average Date and Day Display Operating Time: Approximately 8 months when fully charged Second Hand Stop Function Charge Warning Function Overcharge Prevention Function Quick Day Correction Function Quick Date Correction Function Shock Detection Function I bought this for a family member, but they don't usually wear a watch, so it was only used for a short time.