Features: Find out the short-circuit in one second, solve the problem in a step. Long life battery 24 hours x 7 days. Micro USB charging, instant heating up. Small and outstanding, burning machine artifact in the palm Voltage detection: 4v, cuttent detecting up to 30A 100% brand new and high quality Suitable for short circuit detection of various mobile phones and computers Package Includes: 1 Set x Short Circuit Detector Specifications: Item: Power Supply Short Circuit Detector Model: iShort Pro Detection Type: for 4V 30A Charger: Micro USB Size:approx 95x77x25mm/3.74x3.03x0.98in note: Due to the light and screen difference, the item's color may be slightly different from the pictures. Please allow 0.5-2 cm differences due to manual measurement.