The TensCare Somnus is a clinically developed and proven CES (Cranial Electrotherpay Stimulation) that helps your brain regulate and balance its brain waves. This gives you improved sleep quality and reduces the effects caused by insomnia. In addition, it also helps reduce stress, depression and anxiety. Lack of sleep can cause many problems, from lack of concentration and difficulty at work to weakening the immune system. Therefore, sleep is important and the somnus can help. In addition, Somnus uses the body's own regulation skills and is a great natural alternative to medications that require only 20-60 minute daily sessions. Simply attach the ears and let the device do all the work. Sit back and relax. It is easy to use by simply setting the timer and intensity on the convenient LCD screen and the Somnus does the rest. Plus, the battery has a long battery life of 20 to 30 hours, so you can do many sessions before you need to recharge it.