








⚡ Master resistance with precision and style — don’t let your projects settle for less!
The GME RD-300 is a professional-grade resistance substitution decade box featuring a wide 7-decade range from 1Ω to over 11MΩ, with 1% accuracy and 1-watt rated resistors. Designed and engineered in the USA, it offers rugged portability, versatile connectivity, and an intuitive interface, making it ideal for prototyping, calibration, and educational use.





| ASIN | B06ZZK5988 |
| Best Sellers Rank | #64,722 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Decade Boxes |
| Brand | GME |
| Color | White + Green |
| Date First Available | March 21, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 15.2 ounces |
| Item dimensions L x W x H | 6 x 3.5 x 2 inches |
| Item model number | RD-300 |
| Manufacturer | GME Technology Inc |
| Measurement Type | Decade Box |
| Power Source | Battery Powered |
| Product Dimensions | 6 x 3.5 x 2 inches |
| Style | Handheld |
| UPC | 761691287674 |
| Upper Temperature Rating | 122 Degrees Fahrenheit |
E**.
Great gauge tester
Worked perfectly for testing a fuel gauge
R**O
Quick delivery and quality
Gooq quality!
T**R
Best I've found - a bit pricey tho
It's a nice quality box. Sturdy box, nicely laid out. Switches work well and feel good (not cheap like some boxes) Accuracy is very good. 1W rating is very handy - not needing to baby it like a 1/4w or 1/2w unit. Binding posts are kinda cheesy. No test leads. A bit pricey but at least it's decent and sturdy.
L**R
Well made. Sturdy.
A well made unit that I find handy when testing electronic circuits or checking meters.
D**S
Well made product, does the job!
This thing is going to save me a lot of time selecting the right resistor for LED headlights in model RR locomotives. It looks quite accurate when measured by my good Fluke DVM.
G**N
Wow such a deal!
Decent R-boxes have long been in the hundreds of dollars, prohibitively expensive for little guys like me... up to now. I got this box. put my Fluke 80 on it, and it checked out on all the values. Very nice. The 1 Watt rated power is excellent as it will avoid a lot of inadvertant blowing-out of a value. Darn good R-box. Thanks GME!
M**K
Good performance
One of the best resistance boxes around very good Matched with a calibrated fluke and it's extremely close Awesome product
D**S
Just received this and it looks very nice
I like it. Nice switches, professional feel, nice case, too. Claims all resisters are 1 watt which is pretty good at the price I found here. Also, it claims internal resistance is only 0.3 ohm which is impressive. Haven't used it yet.
Trustpilot
3 weeks ago
1 week ago