Hantek Ignition Capacitive Auto Pickup/Probe (HT25) It is a kind of inductive capacitance sensor. High quality and professional high voltage ignition probe. The loot line has three ends, a joint meet oscilloscope for BNC use. A clip for use, a clip grounding to pick high-voltage gleaned clip with. Loot clincher over is a attenuator, used for loot high-pressure attenuation for low pressure, thus protecting oscilloscope not electrify impact.