The SL-33, RedSight Light™ Pro is a red LED flashlight for low-light use. It has nine red LED bulbs. This flashlight is great for astronomy (reading star maps), photographic darkrooms, or reading theater programs without disturbing others. It has two brightness settings to accommodate various needs. The glow-in-the-dark green rubber grip ensures you’ll never misplace the RedSight Light™ Pro. It comes with a handy attached carabiner clip so you’ll have it wherever and whenever you need it. Uses 3 AAA batteries (not included).