Anybody tried testing transistors?

Yes, I have. The hFE function measures the DC gain of the transistor when correctly inserted into the circular connector on the left of the multimeter. You will notice the connector is split for NPN & PNP transistor gain testing respectively with connections for both the Base (B), Collector (C), and Emitter (E) of your transistor. Be sure to properly insert your transistor leads all the way down on the correct side for NPN or PNP transistors as well as first identifying your transistors Base, Collector, and Emitter leads for proper testing. I just uploaded a picture on the listing page shows a transistor having it's hFE DC gain tested which is measured at 349. This is normal for this transistor and shows it functioning properly. Common transistor DC gain may be between 50-500, but this varies greatly transistor to transistor. The picture is not live on Amazon yet, so in the meantime here is a link to it for reference: https://www.protechtrader.com/image/PDM-711-Digital-Multimeter-hFE-Transistor-DC-gain-testing.jpg Also uploaded to Amazon a video demonstrating the Square Wave Function Generator Output from the PDM-711 Multimeter: https://www.protechtrader.com/image/Protechtrader-pdm-711-squarewave-function-generator-demo.mp4 If I can do anything else or if you have any other questions just let me know. We are a small husband and wife business and customer satisfaction is truly very important to us. Have a great day! Al & Amy aka ProTechTrader

How loud is the buzzer? Most multimeters have a tiny high-pitch sound that is nearly inaudible and useless to me.

For the continuity test function on the multimeter the buzzer is audible fine for me, and I have never had issues hearing it or had any complaints about it. Personally I find it very useful for circuit testing, but I have not used it in a very loud environment if that is what you are looking to do. It would be hard to define without testing on a sound meter, but that said it is about the typical loudness of buzzers in similar multimeters due to the piezoelectric elements used to emit the sound.

Does this have a warranty?

Hello! Yes it does have a warranty against factory defects and workmanship for 90 days. We at ProTechTrader stand by our products and are happy to help our customers with issues so do not hesitate to contact us directly at CS@ProTechTrader.com or through Amazon messaging system.

Brand	ProTechTrader
Power Source	Battery Powered
Style	Basic Digital Multimeter PDM631
Color	Black
Item dimensions L x W x H	4.8 x 2.6 x 0.9 inches
Min. Operating Voltage	9 Volts
Measurement Type	Multimeter
UPC	789048343095
Manufacturer	ProTechTrader
Part Number	PDM-631
Item Weight	6.1 ounces
Product Dimensions	4.8 x 2.6 x 0.9 inches
Item model number	PDM-631
Batteries	1 9V batteries required. (included)
Is Discontinued By Manufacturer	No
Material	Plastic
Voltage	500 Volts
Amperage Capacity	10 Amps
Item Package Quantity	1
Special Features	LCD Display, Transistor Testor, Audible Continuety Buzzer, AC DC, Digital
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Zinc Carbon

Basic Digital Multimeter with 7 Test Functions AC DC Voltage Resistance Current Transistor Diode Audible Continuity Buzzer and Square Wave Output

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