1. Switch on and off: Press and hold the key for 3 seconds. 2. Vibration frequency switching: After power on, short press the key to cycle between 7 frequencies. 3. When the amount of charge is required, unscrew the upper cover and use the standard DC charging cable and standard USB/5V charger to charge the product. When the battery is full, the blue indicator light is on. 4. Warming: When charging, short press the key, red indicator light. Bright, automatic stop after heating for five minutes, red light off. 5. This product is rated voltage 5.0V, rated current 500mA.
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