Product Name: Sleep Aid Product model: KS-ZMY02 Color: White, Red, Green Material: environmentally friendly ABS shell+oil spray+stainless steel Input: 5V/500mAh Output: 3.7V/0.3A Battery: 180mAh, C-port charging: 90 minutes Usage time: 2-3 days Product size: 6.6 * 4 * 2.5CM Packaging size: 10.6 * 10.6 * 4.2M Packaging list: 1PCS host, 1 data cable, 1 instruction manual Certification: Product appearance patent, national standard GB qualified CE/ROHS/FCC/complete certification Note: This product is in neutral packaging in both Chinese and English, Main function: CES micro current pulse CES stands for Cranial Electrical Stimulation, which means transcranial microcurrent stimulation therapy. It is a method of using handheld electrodes to transmit a special waveform of micro electricity through the temporal region to the central nervoussystem of the brain, stimulating the release of a series of neurotransmitters related to sleep and emotion, inhibiting the release of stress hormones, and regulating brain activity to achieve the goal of treating insomnia and anxiety. The commonly used frequencies for CES in clinical practice are 100Hz and 0.5Hz, and the current waveform can be summarized as symmetrical biphasic pulses and delayed bidirectional pulses. The default time slot word duration for CES products imported fromthe United States is 20 minutes. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.