Beanie Hat with 5 integrated Red LEDs - extra batteries included - winter hat with integrated headlamp for preserving night vision during astronomy star gazing astrophotography night photography INTEGRATED RED LEDs - Stop fumbling around with your Red Flashlight and start using this Beanie! It'll preserve your night vision and you don't need a separate heavy headlamp. Warmth and red light in one beanie! RED LEDs - Perfect for preserving your night vision and still being able to see for night photography, astronomy, and astrophotography. We work hard to preserve our night vision in order to get the best images and views of our world at night, let the Beanie help you! LIGHTWEIGHT - at only 2.5oz, you can wear this comfortably all day and night. Headlamps and flashlights are heavy and outdated now that you can have a hat with Red LEDs integrated into it! EXTRA Batteries - It comes installed with 2 CR2032 batteries and I've included an extra 2 batteries to keep in your gear bag. These are coin cell type batteries that are lightweight and won't take up much room in your bag. On average, the LEDs will run for 24 hours continuously on these batteries. With the extra 2 batteries, you've got 48 of light at your disposal! SIMPLE TO USE - On/Off switch easy to locate and find even with gloves on. You can see in the pictures that the On/Off switch is located under the brim of the hat. After a few times of switching it On/Off, I have faith you'll have no issues firing this light up with no problem.