Powered by USB Interface. Plug and Play Device. Automatically Measurement Function. Easy for Operation; Change the Voltage/Time Division Gear with Single Hand. No Need to Operate on the Computer; Built-in LED Light, Providing Better Light for User's Convenient Operation in Dark Environment; Light Weight and Portable. Suitable for Human Body's Design; DVM Function, Real-time Display the Voltage Measurement Results; 20MHz Bandwidth. Meet the Requirements of Measurement; Different Kinds of Language Available.? 20 Types of Auto Measurement Function, Pass/Fail Function; Operating System：Windows NT，Windows2000/XP,WIN7/8; Possible to Connect to Laptop Directly. High Cost Performance.