AC/DC Voltmeter DC Ammeter Ohm Tester Electrical LCD Digital Multimeter DT-830B 3 digits, 7segment,0.5high LCD Display Max display: 1999, Auto polarity display Small and compact design,Low cost, pocket size ideal for hobby & DIY users Sampling 2~3 times readings per second.Diode assembly test / Transistor P-N junction test/Transistor hFE test. Diode assembly test / Transistor P-N junction test/Transistor hFE test.