Takes a single 2032 battery and has a small switch behind the backing to turn the LEDs on and off. Strap is elastic and adjustable. Very lightweight and comfortable to wear on your head for extended periods of time. Perfect for any Splinter Cell/Sam Fisher cosplay. NOTE: these are not real night vision goggles and you cannot see through them. The item "Custom made Splinter Cell Sam Fisher Night Vision Cosplay Light-Up Goggles" is in sale since Tuesday, September 3, 2019. This item is in the category "Clothing, Shoes & Accessories\Specialty\Costumes, Reenactment, ...