1Hz-500kHz DDS Signal Generator with Schumann Resonator, Portable Multifunction Waveform Generator with AC/DC Power, Ideal for Oscilloscope Calibration, Audio Testing, and Stress Relief

Surprisingly functional for such a small and inexpensive unit.

I had purchased this little signal generator to check out my Ham radio roof antenna. I never thought to use it to replace my big old signal generator in my ham shack. I was taking an advanced electronics course at a local college, and was using my old signal generator for class projects. Then my old signal generator bite the dust! So, I pulled out this pocket signal generator and presto, I was in business again! Great pocket device, my only complaint is that the instructions need to be better. You must push the Run button to generate any signal. For the little money I spent on this generator it was worth every penny. The signals were clear until the very high frequencies. The little thing fits in a large work pocket, and I intend to take it up on my roof to check on my Ham radio antenna.

Works ok for $36. The sine and triangle waves are the cleanest outputs. The other waveforms have some distortion in their output using my digital 12-bit scope, but it's a $36 non-professional waveform generator... Waveform frequency is very accurate. I am surprised how well it worked for the price paid. For home use, it serves it's purpose.

Awesome piece of kit! Been running it for over a month now. Use it in electronics projects and for healing. Easy to adjust frequency and waveform in a no nonsense package.

Cannot get the product to work without hooking up a speaker, operating instructions our extremely vague. Sound being produced through the speaker is not the intention of the product.. product is not capable of having healing frequency capabilities. extremely disappointing.

The signal generator works very well, especially for the price. The membrane buttons are a little hard to press and setting the frequency is a bit tedious but it works well overall. The signal is very stable and you have your choice of a large number of signal types.

Haven't got this figured out yet. Need better instructions. Appears to be well constructed.

It’s a good product.

for testing Audio this is a great tool to use and gives sound results

You need to buy a speaker or amplifier to hear sound as well as adapter to connect it . Should be told this at time of purchase and given options to buy with or without .