Features:*Hand-held sleep instrument: apply low-frequency electrical pulses stimulate to the palm, conduct from the nervous system of the hands to the brain stem to realize the same frequency of the hands and brain, have a positive effect on neurotransmitters such as endorphins and melatonin, and make the human body more calm and relaxed.*Help sleep: Help sleep, relax the emotion, and the nervousness in the brain will change to guide sleep *Calm the mood: Reduce stress in daily life and work to relax * Invigorate the : the right-hand invigorate mode, get rid of troubles, improve concentration, double the efficiency of learning and work *Compact and lightweight, easy to carry.*Heating mode design: In heating mode, it can better promote the rapid increase of neurotransmitters.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Material: ABS+stainless steelSize: 38*50*80mmInput voltage: DC 5V/1AWorking power: 5WCharging time: 2.5H full chargeUse time: fixed 20 minutes automatic shutdown, can be used about 40 times.Charging interface: Typ-C chargingProduct configuration: host*1, USB cable*1, Chinese and English manual*1, certificate*1