TruEbox TFT-IV is a portable electrical test and analysis system for semiconductors. The system provides three bias voltage channels and measures one current channel, with modes IdVg and IdVd. The device can monitor the real-time I-t or I-V curves and share the measured data via the mobile app. TruEbox TFT-IV excels in fast response speed and high resolution (pA), making it a perfect candidate for electrical testing and analysis of semiconductors. By measuring MOS tubes, TFT, photodiodes, and other devices, the TruEbox TFT-IV can help in biomedical testing, portable electronic product development, sports health monitoring, and further scenarios.