Hail Satan, Samael, Santa, or any other dark and evil deity of your choosing with these Crowley-approved* volume attentuation assistance devices, or "knobs" as they're more commonly known. Guaranteed to improve the efficacy of any thrown horns by 25.4% when in Pentagram mode, summon at least 2 more demons in Pentacle mode, and increase rarity of presents by 15% with the Treetopper toggle enabled.
*Dan Crowley, Night Stock Manager at Kwik-E-Mart #256