It’s Monster Product’s 35th anniversary! In celebration, they are offering up 50% off sitewide with code MONSTER35TH through August 22. It even works on sale prices so you can use the code on their popular headphones which are already reduced by $50-$60. The Ntunes are $59.97 with code and discount; the DNA are $84.98 and the Diamond ones are $134.98. Free shipping is available on orders over $99.