Regular body lights are about the size of an aspirin tablet, but this extra large body light is nearly the size of a dime! The super-strong magnetic back allows you to stick a bunch of lights nearly anywhere, from your ears to your hair to a visor! Flashes bright red and green, with a nice sparkle effect. Uses 2 replaceable AG3 (LR41) batteries (included). Made of plastic. Connects via a magnet with a piece of metal for easy attaching. On/off button on the back of the light.