Some of the best customer service in the avionics network that I’ve had the pleasure of dealing with. [I chose EI because of the] features, simplicity, and the user-friendly platform.
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S-300 External Shunt
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Product Overview
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Package includes:
- S-300 Shunt
- Installation Instructions
Description
Package
Retail Price
S-300 External 300 Amp Shunt
S-300
$60

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Testimonials
Customer Testimonials
Just about to begin flying with the EI MVP-50P, so no in-flight feedback yet. But I did study the user manual, then sat in my plane going through the screens, menus, etc. It was very easy and intuitive to locate everything, so I’m confident that it will become second nature to do this in flight… Very happy with all interactions with EI.
- Customer
Robert B. from California
- Aircraft
2002 Diamond DA40-180
- EI Instrument
Sales reps have been very friendly and helpful.
Excellent installation instructions [&] recommend[ed] by others.
- Customer
Ben C. from Alaska
- Aircraft
Piper PA-22-160
- EI Instrument
Outstanding support. From the friendly demeanor of whoever answers the phone to all the way to [their sales representative]. Your CGR-30 series is superb.
Easy install, good product. [I chose EI because of my] experience with [the] product.
- Customer
Dave S. from Missouri
- Aircraft
Beechcraft Bonanza Model 35
- EI Instrument
[I chose the CGR-30P because of its] ease of use.
- Customer
Chris M. from Pennsylvania
- Aircraft
Piper PA-28 Cherokee
- EI Instrument
Awesome Tech Support. Like the functions it supports and the fit and look in the panel.
- Customer
Brian M. from California
- Aircraft
Mooney M20F Executive 21
- EI Instrument
I was able to try out the CGR-30P in a flight school plane. I was very impressed with the ease of use, visual quality, and information provided on the main screen… I feel it will pay for itself in fuel savings, and extended engine time before overhaul.
- Customer
David M. From South Carolina
- Aircraft
Cessna 182J Skylane
- EI Instrument
Excellent tech help…
Great service for Electronics International. Very helpful with what it needed for my aircraft. My mechanic has installed several of these units and highly recommended this for my aircraft.
Installed digital volt/amp gauge in PA 28-181. Great unit easy to install. Much better than original.