Features: 1.Universal: This instrument can be used to detect short circuits on any cell phone and laptop. 2.Function: Short circuits can be detected and repaired within seconds, and various short circuits on the circuit can be tested. 3.Parameters: Support input voltage AC 90?230V 50Hz 60Hz, output voltage 0?5.5V, current 0?30A. 4. Overheating protection, overcurrent protection, overvoltage protection, voice prompt, automatic recovery, safety and efficiency, positive and negative identification. 5.Material: Made of aluminum alloy and plastic material, simple design, portable, light and easy to operate. specification:Item Type: Mobile Phone Short Circuit Detector Material: Aluminum Alloy, Plastic Model: TS 30A Product Size: Approx.154 x 85 x 38mm / 6.1 x 3.3 x 1.5in Input Voltage: AC 90-230V 50Hz 60Hz Output Voltage: 0-5.5V Maximum Current: 0-30A PackageList: 1 x Repair Instrument 1 x Power Cord 2 x Test Lead Wire 1 xUser Manual