Working principle: The handheld sleep aid is specially designed to improve your sleep quality. Intermittently release micro-currents to soothe nerves, which not only improves sleep quality, but also relieves palm fatigue and soreness. Efficacy: The main needles of the hand-held sleep instrument have the following effects, improving sleepiness and light sleep, optimizing sleep quality, enjoying relaxation, and saying goodbye to sleep disorders. Sleep use: The handheld sleep aid comes with a sling, which is convenient for carrying the storage box. Put the sling on your wrist when you sleep to fix the sleeper and give you a good night's sleep. Operation method: Hold the product in the palm of your hand (recommended for use with your left hand), long press M to activate the machine, then short press M to switch modes, and "+" "-" to adjust the gear. After adjusting to the relaxation mode, you can easily enter the sleep state. Comfortable touch: Made of high-quality ABS material, it is comfortable to the touch, has a long battery life, and the sleep aid is stable and durable, and can be used for a long time.