I'll log my experiences here if that is ok. Got my device. Just learning to use it but seems fairly simple. I did 5 minutes on low around my knee and bit on stomach 36 point. Zero heating of tissue, no noticeable negative effects. Will take a walk in a few hours and see how the hills feel. I wasn't having any specific knee issues but sometimes that one can complain, so seems a reasonable test spot. Will try on the left ribs / splenic flexure area in a bit. Nice that the device has a warmup feature. Nearly silent when on low but I could hear the buzz.

I am already running low on the 8oz gel that came with the unit and I found this on Amazon, 1 litre size for around $15. Has anyone found a better deal anywhere else? Is all Gel the same or should I be looking for anything special? https://a.co/d/0ctrk3PY

Jerry Li, an electrical engineering concentrator, developed a flexible cuff as his senior capstone project. The cuff uses ultrasound rather than electrical currents to stimulate the vagus nerve with precision. The approach is presented as having the potential to be less invasive and more targeted than prior methods. Applications noted include future treatment of depression, epilepsy, or support for neuroprosthetic control. Li stated that to his knowledge no one has used microfabricated ultrasound transducers for peripheral nerve stimulation before. Microfabrication work began in May 2025 and continued over the summer. Electronics design was the focus during the academic year. The microfabrication process itself was described as the most challenging element, characterized as a long and detailed procedure even with expert guidance. The project drew on multiple disciplines including neuroscience, phased array theory, wireless charging, and mechanical prototyping. Li noted that the interdisciplinary scope helped build his confidence as an engineer. The work was conducted under the Harvard John A. Paulson School of Engineering and Applied Sciences. https://www.facebook.com/hseas/posts/for-his-senior-capstone-project-electrical-engineering-concentrator-jerry-li-dev/1342732331285198/

Reading this module, I am slightly confused. In the "find your entry point" section, the text says: >>"Right-Side Focus: Place transducer 1 finger behind your right ear (temporal bone). " Which seems to be where we did the left side vagus stimulation. But then just after it appears to be pointing to the area where the amygdala is, >"In the above picture, you can see the red shape, you want to keep the Ultrasound contained within that >particular region of the brain to target the Insular Cortex. " which makes more sense to me as an entry point for processing trauma, since in meditations this is what I have found to help most folks (visualizing halfway between the edge of the eyebrow and the top of the ear, stimulating it in the front which flips from emotional physical presentation to frontal lobe conceptual resolution of trauma aha! moments and clarity of trauma memory).

I saw on Sterlings X post that there was going to be a new ultrasound machine that does 40HZ, when will that be coming out as I was going to buy a device, but I might aswell wait until this one comes out, as long as it does all the frequencies that the US 2000 pro does.