GT1 Pro can be used with any laptops & computers,when diagnose with BMW car ,just connect the External Hard Drive with comp. FUCTION: Read faulty code ,clear faulty code ,data stream .activate state,programming ,component test ,maintenance data information ,components location ,wiring diagram etc...,TIS AND DIS ARE SUPPLY all of system diagram of all of BMW car, Components location, maintainence method and coding information etc. Can do completely of BMW car system.