THREE COLOURS AVAILABLE: The calm palm sleep aid is available in three colours: turquoise, yellow and silver, the simple and stylish colour scheme is more conducive to achieving a good night's sleep, reducing headaches and relieving discomfort, we wish you a good night's sleep. USB CHARGING: With a USB charging cable and 500mAh of built-in capacity, the Handheld Fast Sleep Aid can run for up to 20 hours on a single charge, but we recommend keeping it to 15 minutes of use at a time. WIDE USES: Whether you are travelling long distances, relaxing in the office or sleeping at night, Handheld Fast Sleep Aid can help you regulate your sleep mood in 20 minutes and create a quiet environment for you to sleep. LIGHTWEIGHT AND PRACTICAL: Microcurrent Sleep Helper Tool weighs only 140g, no pressure and no burden to wear, simple appearance, simple operation, easy to adjust the size of the current with a single click to help you relieve anxiety and stress at all times. FAST SLEEP: Sleep Aid Machine can help people with poor sleep quality to fall asleep quickly within 20 minutes, using microcurrent to stimulate neurotransmitters in the cerebral cortex to complete your sleep, and give you a good dream.