Coast LED Lenser LL7579 Write Light Pen Blue LED Flashlight w Keychain LL7579 Write and Light Pen Flashlight w/ 2 Keychains,Blue LED 3 way flash slow, fast, constant11.4 mW bright LED Light output High Quality LED, White beam 5 inch length,3.4 ounces w/ 2 key fobs for dual use 4xAG5 Batteries included, 110 hour run time