Red LED flashlight preserves night vision!

The astronomer's friend, Celestron's Night Vision premium red LED flashlight will let you see what you need to see without compromising your night vision. The NightVision's two red LEDs shed plenty of soft light while preserving night retinal adaptation better than red filters or other devices. Brightness is adjustable, and low current draw means the NightVision flashlight operates for a long time on a single 9-volt battery (included).