Made with a durable black coated 45mm steel case and rubber black strap, water resistant to 200 meters.- Swiss-made- Constant glow for up to 25 years- Time/date functions- Movement: Swiss quartz- Caliber: RONDA 715- Water-resistance: 200m (20 ATM)- Case diameter: 45mm- Bezel: unidirectional rotating- Case material: 316L stainless steel- Case back: 316L stainless steel screw-in see through- Crystal: sapphire, anti-reflective coating- Crown: Screw-in, crown protected- Strap / bracelet: black genuine rubber- Strap / bracelet buckle: black CARBONOX- Lug width: 24mm- Case height: 13mm- Weight: 105g- Approximate battery life: 6 years