Features This car igniter probe is an inductive-capacitive probe that must be used with an oscilloscope. Directly from the oscilloscope display makes the firing voltage of each cylinder change over time. It can be used to test the parameters of the spark ignition secondary overlapping wave and overlapping wave, so as to detect and diagnose the ignition position of the engine. A pick-up clip is an attenuator that picks up high voltages and attenuates them to low voltages, protecting the oscilloscope from electric shock. This pickup line has three ends, one is BNC, used to connect to the oscilloscope, one is a clip, used to ground, and the other is a pickup clip, used to connect to the high-voltage line. Features: -This car igniter probe is an inductive-capacitive probe that must be used with an oscilloscope. -Directly from the oscilloscope display makes the firing voltage of each cylinder change over time. -It can be used to test the parameters of the spark ignition secondary overlapping wave and overlapping wave, so as to detect and diagnose the ignition position of the engine. -A pick-up clip is an attenuator that picks up high voltages and attenuates them to low voltages, protecting the oscilloscope from electric shock. -This pickup line has three ends, one is BNC, used to connect to the oscilloscope, one is a clip, used to ground, and the other is a pickup clip, used to connect to the high-voltage line. Specifications: Cable length: 250cm/98.42inch Weight: 155g When used please note:(1)Test clips shall not directly clip in spark plug, should be caught in the connection of the spark plugs of insulation wire, in order to prevent the breakdown and causing a shock.(2)To distance other high-voltage at least 2 inches apart, lest produce interference.(3)The attenuation of HT25A can reach 5000:1; The main lead line of HT25B is 2.5 meter long, and the attenuation can reach 10000:1. Package Included: 1 x  HT25 Auto ignition probe Package List