Product Description: For optimal comfort, the Renpho eye massager is ergonomically constructed. It is perfect for a large number of individuals. Teenagers who use their phone or tablet excessively, producing eye tiredness or myopia, office employees who use their computer on a daily basis or older persons with dry eyes, and those who are stressed or sleep deprived. The built-in heating pads of Renpho's eye massager give a pleasant temperature between 104 and 107 degrees Fahrenheit (40°C-42°C), which is better for easing eye puffiness, dry eyes, and other conditions. A heat compress can help to regulate ocular metabolism, alleviate symptoms such as dry eyes, and minimize dark circles. Bluetooth Customizable Music - Built-in speakers and prerecorded music help you unwind. You can even use Bluetooth to connect and play your own music. Music alleviates both mental and physical stress. Our electric eye massager folds into a smaller size, allowing you to carry it with you anywhere you go. Furthermore, the headband is simply adjustable in size and is ideal for all teens and adults. How to use: "Hold the power button for 3-5 seconds to turn on/off the massager Gently press the power button to switch between different modes. Audio voice will confirm the mode change. 5 modes with different combination of Air compression, heat, vibration and music." Caution & Warnings: Safety auto shut-off after 15 minutes of continuous use prevents massager from overheating. If you have had an eye operation, a retina issue, a cataract, or glaucoma, we do not advocate using eye machines. Our eye machine uses oscillating pressure and rhythmic percussion to make the skin around the eyes shinier. Read More