*Selectable top gear 4/5/6/7/8*Display range N,1,2-8*Shift warning with bar graph*White LED display at night*Waterproof(Shift warning RPM is adjustable)*Small size (40x60x17.5mm)*9V with PP3 battery available*Power DC10-16V(regular 12V)*Handle clamp (for 7/8'' or 1'') includedDISCLAIMER: It doesn’t work on HD Sportster.