About this item Reliable USB cable tester : The product can be used to test different types of USB cables, including TypeB 3.0, TypeB 2.0, TypeC 3.0 (TypeC 3.1/TypeC 3.2), roB 3.0, roB 2.0, MiniB 2.0, and Lightning. Convenient and practical : The product features a portable design, compact size, and is easy to carry and use. Multiple power supply options : Supports two power supply modes: CR2032 button y or external power supply (Vin) within the range of DC 3-12V. Vin provides reverse connection protection. indicator lights : Test results are displayed through 24 indicators, with each pin corresponding to an light. Multi-functional and practical : Supports multiple types of interfaces, allowing quick detection of data cable abnormalities and detection of internal short circuits that may interfere with normal operation