Features:1. This module is the finished module oftransformer for small scientific production.2. The input voltage is DC 3.7-7.4V and can outputhigh voltage of DC 800-1000KV.3. According to the tesla coil principle,the module outputs high voltage pulse current, small volume and highefficiency.4. The peripheral circuit is simple (simply connect the switch and install the battery), the discharge intensity is violent.5. It can be used as high voltage source for high school science experiment, electronic instrument and anion generator.Specification:Item Size(L*Dia.): 9.1*2.3cm / 3.58*0.90inInput Voltage: 3.7-7.4VInput Current: 4AInput Cable Length: Approx. 10cm/3.94inOutputVoltage: 800-1000KVOutputCurrent: 0.5AOutput Cable Length: Approx. 16cm/6.30inDischargeDistance between Two Poles: 1.5-2.5cm / 0.59-0.98inPowerSupply: 3.7V Li-ion battery, NiCd/NiMH battery pack, 4V or 6V lead-acid battery (Not included)Weight: Approx. 65g / 2.3ozPackinglist:1 * HighVoltage Pulse GeneratorInstruction:The mould is divided into input end and output end.The red and green cable is the input end, and red one is positive, green one isnegative. High voltage arcs can be generated by connecting the input end to thebattery.Note:1. Avoid power on when no load. Output ends of cableshould be adjusted properly before power on, and the arc distance depends onbattery voltage and capacity.2. The arc distance should be from short to long, donot produce a longest arc at first or the module might be damaged easily.3. The module has high power and inner heat is noteasily dissipated, so it can not work for long time.4. Less capacity the battery has, lower the outputvoltage is. It is recommended to use above 2000MA lithium, it is better tochoose above 4000MA battery.