Savvy Adventurer's Blitz EDC Second-generation Keychain LED Flashlight 25 Lumen NICHIA 5mm white LED with 100,000 hour life Sized for everyday carry with up to 10 hours of lessening serviceable light Machined from solid aircraft grade aluminum with anodized finish Knurled rotating bezel on/off switch 1.34 inches long (34mm) & 0.44 inch diameter (11mm)