Honeytek A616 Digital Car Engine Analyzer with AC DC Voltage Current Dwell Tach functions DWELL:3/4/5/6/8CYL(1.2%+2); TACH:3/4/5/6/8CYL(1.2%+2) DC Voltage:200mV/2V/20V/200V/1000V(0.5%+3); AC Voltage:2V/20V/200V/750V(0.8%+5) DC Current:20mA/200mA/2A/10A(0.8%+1); AC Current:20mA/200mA/2A/10A(1.8%+3) Resistance:200/2K/20K/200K/2M/20M(0.8%+3); Temp.-20~1000/-4~1832(1.0%+3) Noted: NO battery--Other function:Diode test,Max Hold,/ changeable,Backlight Display,Spolight