Specification: Material ABS+PCSize 40.5mm x 25.5 x 13mm Working hours About 15 hours Pulse frequency 10 Hz-1500 Hz Battery capacity 3.7V / 80m Ah Feature: Small device, great effect Adopts trans-cutaneous electrical nerve stimulation (TENS) technology to effectively stop snoring The Smart Electronic Muscle Simulator has been tested by more than 60 snorers of Science & Technology By using TENS technology to stimulate the respiratory muscles, it has been proved to effectively reduce the number of snores & even stop snoring altogether, allowing you to sleep peacefully! Package Included: 1 x Main Component 1x Charging Dock 1xx Quick Start Guide 1x User Manual 1x Charging Cable 10x Electrodes Working principle:A. The laryngeal muscles are stimulated by low frequency current to stimulate contraction & achieve the effect of prevention & rehabilitation.B. Product intervenes physically with micro sounds & micro vibrations at 36 levels, when the intervention is successful, the soft tissue at the back of the throat will contract & tighten to open the airway wider, so that you breathe smoothly & thus stop or diminish snoring C. After period of use, your throat muscles are gradually tightened through exercise & will not be relaxed any more, therefore, you will stop snoring or lessen the frequency of snoring, then it is up to you whether to continue using this product D. We have app, you can download to your smartphone, after use our product, you can sync data to our app & then you can see how many time