Review on Aideepen Transistor Tester - Automatic Checker Detector for Capacitor, Transistor, Diode, Resistor, Inductor, Capacitance, MOSFET, SCR, LCR, ESR by Joshua Morales

Although this product looks incredibly cheap, it does what it says on the tin. The measurements appear to be fairly accurate. My only real concern is that the plug in the outlet isn't always making a good contact and is giving incorrect readings. I just use the included test leads and they work fine. Please note that the product does not include instructions. I find that using the first three pin positions on the top row - haven't tried the others yet - is great for testing transistors and resistors. However, for capacitance and inductance measurements I use the positions of terminals 1 and 3.