Upgraded from W01, it adds a power indicator and high-power transistor. Just power on, place the sensing tip near the onboard inductor without desoldering. Green LED on = coil normal; LED off = inductor faulty. Ideal for professional repair and DIY debugging. Type-C Powered：Always Ready – Runs directly from any Type‑C source: charger, power bank, or laptop. No batteries to replace, no wall wart needed. True Plug & Play：No drivers, no calibration, no menus. Press the button and test instantly. Perfect for beginners learning board repair and pros who value speed. Compact & DIY- friendly Design：Ultra-small 75×27mm body fits easily into any toolkit, pocket, or even a 3D‑printed enclosure mod. Safe for tight boards and dense component layouts – no accidental shorting risks during probing. High Accuracy & Reliable Stability：Engineered specifically for inductor testing on phone motherboards, Arduino boards, power supply circuits, and other DIY electronics. Speeds up failure diagnosis, and reduces unnecessary part swapping.