Sana has developed a neuromodulation device consisting of a face mask and headphones that use audio and visual stimulation to create a state of relaxation. The device, which is portable and can be connected to a user's phone, is tailored to the user's needs through a built-in heart rate variability sensor. Sana's product is currently undergoing FDA certification and clinical trials, with studies focusing on fibromyalgia, neuropathic pain, anxiety, and PTSD. The company is backed by several investors and aims to improve the lives of millions by optimizing sleep and providing relief from chronic pain.