What else is need to install this turbo timer on my 2001.5 Audi a4 1.8tqm?

http://cgi.ebay.com/ebaymotors/BLITZ-DUAL-TURBO-TIMER-SCION-TOYOTA-NISSAN-MAZDA-AUDI_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116 QQitemZ160265448437QQptZMotorsQ5fCarQ5fTruckQ5fPar tsQ5fAccessories

Thanks for the help in advance!

it's a waste of money but if you need to have it then the kit has all you need