Military Style Glow in The Dark Water Resistant Quartz Watch with Canvas Strap Alloy case + stainless steel back + canvas strap. Quartz movement. Display time, date and week. Powered by 1*SR626SW button battery. 3 ATM water resistant, not for swimming. Slim design, only 0.35 inch in case thickness, and 1.57 inch in case diameter. Suitable for men, women and young people. It may be smaller for strong adult men. Luminous hands, glow in the dark. It needs to absorb sunlight or natural light in all day time, and then it'll be visible in night. The watch does glow in dark night, but it can't last for a whole night.