Features: Compact size of the product, easy to carry and store. With LED lights: test results are displayed through all 24 LED light, each pin corresponds to a LED light. Supports two power modes: coin cell battery or external power supply in the ranges of DC3-12V, provides direction connection protections. The design is simple and intuitived. Users only need to insert the ends of the USB cable to be tested into the corresponding connector, the LED lights will show the function and connection of the USB cable. This enables the user to visualize the cable (Note: the carrying capacity of the cable cannot be tested). USB cable tester is a reliabled tool for testing the connecting and function of USB cables. Specifications: Product name: USB data cable test board Power supply: battery powered (coin cell) / external power supply in the ranges of DC3-12V Type: with case / without case (optional) Product Size: 8x7cm/3.15x2.76in Measurement types: TypeB 3.0, TypeB 2.0, TypeC 3.0/3.1/3.2, MicroB 3.0, MicroB 2.0,and more Package Includes: 1PC USB cable test board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution