Type: Logic ICsCondition: NewDissipation : noOperating Temperature: noPackage: DIPApplication: nocolor:blueMaterial: metal + pcFeatures:This product is Schumann wave 7.83HZ very low frequency generator, features high accuracy and stability.High stable frequency acquisition elements: high stability pulse chip, precision correction capacitance, precision multi-loop adjustable resistorModule size: length and width (102 * 80mm)Frequency: 7.83HzRated voltage: DC 5VRated current: 0.5ANotice:the Switch only for the indicator light ON/OFFPackage Contents:1 * motherboard1 * USB charging cable1 * screw packageOnly the above package content, other products are not included.Note: Light 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.