Feature:1. Safe and Reliable: Support output voltage 0‑5.5V, current 0‑30A, using aluminum alloy, ABS, copper material, durable.2. Use Purpose: Conducive to detecting various short circuits, it can detect a short circuit and repair it within a few seconds.3. Scope of Application: Can be used to detect short circuits on the circuit boards of any mobile phones and laptops.4. Multiple Protection: PCB short circuit repair tool box has overheat protection, overcurrent protection, and overvoltage protection.5. Product Feature: Short circuit recovery, voice prompt, automatic recovery, safe and efficient, positive and negative polarity recognition.How to Use:Directly use.Specification:Item Type: TD-30A Short Killer Box Frequency: 50/60hzOutput Current: 0-30AOutput Voltage: 0-5.5VModel: TD-30AWeight: Approx.670g/23.6ozMaterial: Aluminum Alloy+ABS+CopperAdvantage:This Instrument Can Detect Various Short Circuits on the Circuit.This Instrument Can Detect and Repair Short Circuit within A Few Seconds.This Instrument Can Be Used to Detect Short Circuit Circuits on Mobile Phones and Laptops.Short Circuit Recovery, Overheating Protection, Overcurrent Protection, Overvoltage Protection, Voice Prompt, Automatic Recovery, Safe and Efficient, Positive and Negative Polarity Recognition. Package List:1 x Ammeter1 x Power Cord1 x Test Pen Wire1 x ManualNote:Warning: Long term short circuit test is strictly prohibited for the large current output of the product.