New short killer box is an professional short-circuit Fault diagnosis instrument for mobile phone motherboard repair tool, Help the technician to judge the current interruption of the main board accurately and quickly, Short-circuit fault detection for various mobile phones and computers.Specification:Input: AC110V~230V, 50/60HZ, 5APower Voltage: 0-5.5VMax Ampere: 0-20A/30A Note: TS-30A maximum current support to 30AFeatures:overheating protrctionovrcurrent protectionovervoltage protectionsound prompt automatic recoverysafe and efficientpositive and negative-polarity recognitionThe pen probe tip is special, please pay attention to safety.This pen can also be used on the multimeterWARNING: This box a large current output Long-term short-circuit test is strictly prohibited