This is a component tester. Automatic detection PNP and NPN type bipolar transistors , N, P -channel MOSFET, JFET FET , diodes , two diodes, thyristors , resistors , capacitors , inductors . Automatic detection pin definitions. Measurement of the bipolar transistor current amplification factor (B) and conduction voltage emitter junction (Uf). Darlington transistor may be identified by the amplification factor of the high threshold voltage and high current.It can detect diodes inside the bipolar transistor and MOSFET protection and displayed on the screen.With capacitors bigger than 2 uF it can mesure equivalent series resistance (ESR), with a resolution of 0.01 ohms.