To activate the light up horns in the viking helmet simply slide the button on the battery packs to ON. Each horn has its own light up switch, so light either horns or both! Each lit horn flashes red and blue LEDs. Height: 10.0 in. – Width: 13.5 in. – Helmet Size: One size fits most. Note: Majestic mustache not included LED Colors:Blue and Red Batteries: Includes 3 replaceable AG13 batteries. – Weight: 1.41 LB