The Men's Nike Mettle Hammer WC0021 Watch is a sporty and casual wristwatch with a digital display and quartz movement. It has a square-shaped silver stainless steel case with a black dial and a black polyurethane one-piece strap. The watch is water-resistant up to 100 meters or 10 ATM and features a timer. The reference number is WC0021, and it requires a battery replacement.