Wide timing advance adjustment range accommodates stock to highly modified engines. Digitally set RPM limit (100 rpm steps from 3,000 to 9,900 rpm). Full support for J1850 data bus used for communications with instrument cluster and turn signal/security module (TSM/TSSM). Stores last 30 minutes of engine operation. Extensive diagnostics. Compatible with H-D scan tool. Optional USB interface and software for downloading built-in data logging and programming custom advance curves (P/N 498715), sold separately. Billet aluminum housing with black anodized finish. Easy plug-in installation. Made in USA. TC88A Plug-In Ignition TC88A Plug-In Ignition