Features: Designed for assisting automobile measurement. Can allow oscilloscope to measure fuel injector and primary ignition waveforms. Passive attenuator with 20:1 attenuation, if input a 20V signal, it can output a 1V signal. Because the signal is attenuated, by using this item, oscilloscope can measure voltage higher than its range(20V). When used in an oscilloscope to measure an inductive signal, such as a jet nozzle and a primary ignition, it provides enhanced input overload protection. Don't use it for secondary ignition tests. Specifications: Attenuation: 20:1 Bandwidth: 10MHz Input Res: 1.053M Size: Approx. 61 x 21 x 10mm/2.4 x 0.8 x 0.4in Weight: 27g Package Included: 1 x HT201 Signal Attenuation