Option: TS-30A TS-20A Specification: Input:AC110V~230V,50/60HZ,5A Power Voltage:0-5.5V Max Ampere:0-20A/30A Note: TS-20A maximum current support 20A,TS-30A maximum current support to 30A support output voltage 0-5.5v current 0-20A/0-30A short killer is good for detecing all kinds of short circuit it can detect short circuits in seconds and fix it it can be use to decect shortcircuit on any cellphone and laptop pcb short circuit restore Features: overheating protrction ovrcurrent protection overvoltage protection sound prompt automatic recovery safe and efficient positive and negative-polarity recognition The pen probe tip is special, please pay attention to safety.This pen can also be used on the multimeter WARNING: This box a large current output Long-term short-circuit test is strictly prohibited