Check the listing for details. Advanced CES Sleep Aid Device, Vagus Nerve Stimulation Device w/ Ear Clips Sleep. Condition: New with box. Listed at 45.96 USD. Features:1. This sleep aid uses CES therapy (Cranial Electrotherapy Stimulation) to scientifically guide sleep and effectively improve anxiety, post-traumatic stress disorder and insomnia by gently stimulating the brain.2. Pure physical sleep aid, no drugs, no pain, no side effects, regular use will not have any adverse effects on the body.3. Three modes: comfort mode, stimulation mode, and enhancement mode; 9 adjustable gears to meet the actual needs of different people and help you improve your sleep quality.4. Built-in 1000mAh high-quality lithium battery, which can be used for 30 minutes a day and has a battery life of up to 14 days without frequent charging.5. It is very suitable for people who are stressed, prone to anxiety and depression, and have dif.