Features:Calm the mood: Reduce stress in daily life and work to relax!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.Invigorate the : the invigorate mode, get rid of troubles, improve concentration, double the efficiency of learning and work!Portable Design: Compact and lightweight, easy to carry.Multi mode design: In different 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 measurementMaterial:ABS+ Silicone + HardwareSize:7.5x5x3.5cm