When you want to know with absolute certainty that your engine is running optimally (and let's face it, is there ever a time when you don't want to know that?), you should be using professional test instruments from Electronic Specialties, Inc. Why's that, you ask? Because they've been designing, engineering and manufacturing high-performance engine testing equipment for more than 47 years. Their innovative products have been awarded patents and industry accolades. We offer their deluxe automotive multi-meter kit, PC interface multi-meter and a low current probe for graphing meters, scopes and DMMs. SkyGeek.com and our elite industry partners will help ensure that your aircraft is the very best it can be, top to bottom, inside and out. If you have any questions about our products, our ace customer service team is standing by to assist you.