Wear the MOTHER Bracelet on your wrist. Adjust the wristband size by moving the pins to fit your wrist comfortably. To maximize power generation, wear it snugly against your skin to create an optimal temperature difference with the surroundings. Also, we recommend wearing it in direct light to make the most of the solar panel. Important notes: Clean the device with water; using other cleaning agents may cause corrosion and reduce waterproofing. After activities that cause sweating, like exercising or bathing, make sure to clean the device thoroughly. Avoid using the device in extreme temperatures below -10°C or above +45°C. Do not use the device in high-pressure water environments, such as during diving. If you experience discomfort while wearing the device, stop using it immediately and consult a medical professional.