Features: - Micro-controller using 8MHz external crystal, better measurement accuracy. - Automatically detect NPN, PNP bipolar transistors, N-channel and P-channel MOS FET, JFET, diodes, dual diode, thyristor small power unidirectional and bidirectional thyristor. - One button operation, automatic shutdown with only 20nA shutdown current. - Each test takes about two seconds, with only large capacitors and inductance measurements taking longer. - Can be in correct order and the diode symbol display two diodes, and gives the diode forward voltage.