Feature: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information; 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed. 3.The high-voltage module uses the principle Tesla coil is made of high-voltage pulse output voltage current, small size, high efficiency, simple external circuit(just plug in the switch, the battery can be) discharge intensity violent. 4.The module can be used as high school science experiments, electronic equipment, negative ion generator, high voltage source to use when making small science. 5.Experimental test of the arc distance from short to long , Do not exceed the maximum arc distance electricity. 6.The high-voltage module should avoid the use of electricity in high voltage no-load. Specification: Material: Metal, Plastic Color: Black Size: 39 x 35 x 6 mm/1.54 x 1.38 x 0.24(L x W x H) Weight: 240g Input Voltage: DC3.7V-6V Input Current: 0.5A-1A Output Voltage: DC400KV(Please pay attention to safety when used) Input Line Length: about 40mm ( red is positive ) Output Line Length: about 50mm High voltage bipolar discharge distance: 15mm-20mm High type: Pulse Current Structure: high and low voltage integrated Package Include: 10 x 400KV Boost Step-up Power Module