Features: Multi mode design: In different mode, it can better promote the rapid increase of neurotransmitters. 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. Calm the mood: Reduce stress in daily life and work to relax 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. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material:ABSStainless Steel Size:7x3.2x2.5cm Net/gross weight: 44g/136g Product size: 7x3.2x2.5cm Package size: 12x7.8x5.8cm Input/Output: DC 5V/1A Rated power: 0.5W Working current: 0.2A-1.3A Charging port: Micro USB Charging time: 2H Battery capacity: 500mAh polymers 3.7V Timing: Automatically shut down 20 minutes after starting Product accessories: host, silicone lanyard, Micro USB cable, manual, certificate, white canetto, foam Package List: 1*Micro-current Handheld Sleep Helper