This is a whistle light from Greeshow. Model number: GS-271 It combines a whistle and a light. The light is an LED and has 3 modes (strong → weak → flashing). It's a COB LED light. Size: 92 x 29mm Uses AAA batteries (test batteries included *with an insulation sheet) It comes with a strap so you can hang it around your neck. Includes instruction manual. Brand new, unused. Please understand that this item has been stored at home before purchasing. #HalloweenOnMercari