The TSUYOSA Automatic combines contemporary sports design with timeless appeal in a 40mm stainless steel case. Its captivating sunray green dial pairs with silver-tone accents and a date window, all protected by sapphire crystal. Featuring automatic movement and 50-meter water resistance, this watch handles daily demands with understated sophistication. Model: NJ0150-56X Dial: Green Case: 40mm, Silver-Tone, Stainless Steel Lug: 9.1mm Band: Bracelet, Stainless Steel, Fold over Clasp Crystal: Sapphire Crystal, Superior scratch resistance and hardness Water-Resistance: WR20/5Bar/166ft[Still Water Swimming] Movement: 8210, Automatic, Powered by the release of a wound spring, mechanical movements never require a battery. Automatic mechanical movements have an oscillating weight that winds up the spring using the motion of the wearer's arm.