1. When the hands are rough / When the hands are cold / When deep sleep is needed / When the shoulders are clumped,It is good to use the product. 2. After applying enough hand cream, use vinyl gloves,the massage effect will increase. How to use the product 1. Please place your hands on the product with your hands facing up. 2. After you put your hand, adjust the lower circular plate to the center of your palm. 3. Press the (Power) button to turn on the product. 4. Press the (Mode) button to select the mode (blue / green / red) that you want to use. The first mode is in blue. 5. Press the (Intensity) button to select the intensity (low (Blue) / mid-range (green) / high (red)) The first time you start to use it, it will start at low intensity. 6. Press the (heating) button to turn the product heating on and off. 7. The operation time is set to 15 minutes. The product shuts down automatically after 15 minutes How to charge the product 1. Connect USB to a household charger (â?» sold separately) and charge it. 2. You can not use the product while charging. 3. When you connect the product to the charger, the Charging progress indicator appears. (When charging, the power button blinks / when the power is full the button without blinking.) 4. It takes about 3 hours to fully charge the product and 1 hour using after the charge.