This is a vintage Neuronics Alpha-Theta Wave Sensor Model Neep-4, a rare find for collectors of medical devices. Made in the United States, this device was used in medicine and dentistry during the 1930s to 1960s. It is a unique piece of history that would make a great addition to any collection.
This was an estate sale find sold as is. Don’t really know much about it but hopefully you do. Happy bidding comes in original box.