CES 2.0 Medical Therapy Sleep Problem Insomnia Anxiety Depression Promotes Relaxation Health Anxiety Relief Mood Immune Support gift for family. CES(Cranial Electrotherapy Stimulation) Treatment, same as Alpha-Stim electrotherapy, uses magnetic pulses toinduce low-amplitude, electrical currents in the brain that mimic the effect of naturally produced stimuli. The electriccurrent stimulates cells in much the same way that natural electrical activity would stimulate them, and it has beenfound effective at relieving symptoms caused by depression. Product Name:-CES2.0 Model:HSM04 lnput:100-240v 50/60Hz Output:sv DC 2000mA Size:110x94x20mm (4.33x3.7x0.78inches) Net weight:135g(4.76oz) working voltage:3.7-4.2V Auto-setting:around 5-30 mins lnput Power:3.3w Voltage:DC5.5V±0.5v Charging time:4-5 hours (if one hour treatment per day, it can be used for 10 days) Pulse Modulation Frequency Range:0-15Hz Battery Capacity:60OmAh Contraindications: DoN'T use it with high-frequency equipment, short-wave or microwave therapy equipment, and patients with implanted electronic devices (such as cardiac pacemakers) isnot allowed to use this CES device. Due to different product batches, the appearance , which does not affect the use. Colour:As Shown Material:Plastic Package Contents: 1 * sleep monitor 1 * ear clip 1 * charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.