Features: Stainless Steel Case Two Tone Stainless Steel Bracelet Eco-Drive Movement Caliber: E031 Sapphire Crystal Mother Of Pearl Dial Analog Display Power Reserve Insufficient Charge Warning Function Overcharge Prevention Function Solid Case Back Deployment Clasp 50m Water Resistance Approximate Case Diameter: 31mm Approximate Case Thickness: 8mm Approximate Lug Width: 17mm