Fast guide to  Smarty’s special Features CaTCHER software's inside Ten different  performance levels Fastest download in the industry, a typical ECM update takes less  than two minutes ABS tire height updates in just seconds Not traceable in the stock setting. Smarty leaves no footprint Cold weather 3 Cylinder High Idle is enabled in all softwares Reads  Diagnostic Trouble Codes in plain text No tools required, no fuses to pull USB built in for simple updates Most complete keyboard in the industry Reliable, it works off your OEM hardware Programmable Speed Limiter from 25 to 250 mph (in trucks of 2001 and  2002 the speed limiter is programmable in mph, older trucks have only a speed adjustment) Fast guide to Smarty's softwares levels SW# 1 : Fuel Saver SW# 2 : Only more fuel and Boost fooling SW# 3 : Like # 2 + added timing SW# 4 : “Soft” CaTCHER  no added timing SW# 5 : Like # 4 + added Timing SW# 6 :  Mild CaTCHER no added timing SW# 7 :  Like # 6 + added Timing SW# 8 : CaTCHER no added timing SW # 9 : CaTCHER with Timing Software number Zero, About half the power of a stock software.   Use it whenever reduced power is desired or  when you have to  make sure that NO SMOKE is produced . Software number One, The Fuel Saver software.  Mpg gains vary, in most cases a + 2 MPG has been reported. Please notice that the timing in this software is rather aggressive. HEAVY TOWING is not recommended with this software. Software number Two, This software increases the fuel delivered by the ECM and does the boost fooling. Software number :Three, Same as software # 2 but timing has been added. CaTCHER softwares from number : Four to number Nine, The even numbered softwares are identical to the odd numbered ones, except for the  timing.  The softwares without added timing are intended for use with timing adding  boxes. The power gain at top RPM with these softwares is almost identical.  These softwares  differ greatly in HOW they get there.  Than higher the software number then more  aggressive the throttle response from idle speed up.  Aggressive to the point that the  softwares Eight and Nine can become difficult to handle on slippery roads.  Please be  very careful when you use these softwares for the first time! It takes some time to learn  how to handle them.