Features: brand new and high quality Support output voltage 0-5.5V, current 0-20A/30A. This instrument can detect various short circuits on the circuit. The instrument can detect and repair short circuits in seconds. It can be used to detect short circuits on cell phones and laptops. Short circuit recovery/overheat for protection/overcurrent for protection/overvoltage for protection/voice prompt/automatic recovery/safety and efficiency/positive and negative polarity recognition Specifications: Item: Short Killer Detection Type: TS 20A / TS 30A Size:approx 154x85x38mm/6.06x3.34x1.5in Fit for: Phone Computer Motherboard Package Includes: 1 Set x Short Circuit Detector note: TS-20A current cannot exceed 20A TS-30A current cannot exceed 30A The probe of the test lead is very for sharp, please pay attention to safety, this test lead can also be used on the multimeter. There is high voltage in the instrument, non-professionals should not open it without authorization, the instrument has a large current output, and it is strictly forbidden to test for a long for time. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please allow 0.5-2 for cm differences due to manual measurement.