The Strike Pack™ Eliminator device is the most effective way of adding four additional back buttons to any official standard Xbox™ Wireless controller (Elite controllers not supported) without voiding your warranty or making any permanent changes. No longer is there a need to buy expensive custom controllers and the subsequent costly replacements. With the Strike Pack™ you can map any controller button to any of the four hyper response back buttons, take advantage of built-in MODS and enjoy a gaming experience on a whole new level.