Features: 1.The product has a compact size, making it easy to carry and store. 2.Equipped with led indicator lights: The test results are displayed through 24 led indicator lights, with each pin corresponding to one led light. 3.Supports two power modes: Cr2032 button battery or external power supply (vin) within the dc3-12v range, with vin providing directional connection protection. 4.The design is simple and intuitive. Users only need to insert both ends of the usb cable to be tested into the corresponding connectors, and the led indicator light will display the function and connection status of the usb cable. This allows users to intuitively understand the status of the cable (note: The carrying capacity of the cable cannot be tested). 5.Usb cable tester is a reliable tool used to test the connection status and function of usb cables. Parameters: Product name: usb data cable test board Power supply: Battery powered (cr2032 button battery)/external power supply (vin) within the range of dc3-12v Type: with battery/without battery/with casing/without casing (optional) Product size: 8.5*7cm Package include: Usb data cable test board*1