The smart box 02CM can provide multi-channel bias voltage, measure multi-channel current accurately in real time, and send the measured current data to the mobile phone App via Bluetooth to realize real-time display, storage and sharing of measured data. It has the advantages of fast response speed and high resolution. The product meets the typical I-V characteristic scanning and dynamic current monitoring functions for various biochemical sensors, photodiodes and other components, and can be used in biomedical detection, portable electronic product development, sports health monitoring and other scenarios.