The Electronic Specialties 328 EZ Tach Plus is a handheld digital tachometer designed to measure engine RPM from 0 to 20000 RPM. It provides plus or minus 10 RPM accuracy and works with both 2 cycle and 4 cycle engines from 1 to 8 cylinders. The tachometer can detect RPM wirelessly near spark plug wires or through the included inductive clip. A backlit LCD and built in LED flashlight improve visibility in low light conditions. Powered by a 9V battery, the compact design is built to withstand vibration from high performance engines, making it suitable for lawn equipment, motorcycles, powersports, generators, and automotive tuning.