This is the Momentum M50 Mark II Dive Watch with Scratchproof Sapphire Crystal Display Features: Inspired by Momentum's police department private label program Rugged features make this watch nearly indestructible Available with new LUMINOUS DIAL option or Black Dial Solid steel case 500M water-resistance Standard ultra hard sapphire crystal 6-10 year battery life Momentum M50 has been inspired by our police department private label program. The rugged features make this watch nearly indestructible. Now with our new LUMINOUS DIAL option. Solid steel case, 500M water-resistance, standard ultra hard sapphire crystal and a 6-10 year battery life.