100% Brand New Turns ratio: 100 (the turns ratio is not equal to the boost ratio, usually using a flyback structure to achieve a higher boost ratio) Continuous operating parameters: Input voltage: <120V Input current: <1A Output voltage: <20KV Output current: <20mA Rated power consumption: <15W Rated frequency: 20KHz~400KHz Short time limit operating parameters: Input voltage: <150V Input current: <8A Output voltage: <20KV Output current: <60mA Power consumption: <15W Frequency: 10~800KHz Driver board parameters: Model: Second generation single-tube flyback driver board Input voltage: DC (DC) 5V~15V Input current: <5A Power: <70W Frequency: <26kHz Please note before use: Single-pole flyback topology transformer high-voltage output must pull arc or load, no-load is prohibited! Single-tube type drive board should not work for a long time, if you need to add a fan for a long time or replace a larger radiator! Package Included:1Pcs (as your choice)