■  100Hz, 120Hz, 1kHz, 10kHz 4 frequencies

■  Basic accuracy: 0.1%

■  Test speed: 67ms fastest

■  5 grades sorting, PASS/FAIL instruction

■  Mid-range electric bridge with improved performance

■  Reasonable combination of simple operation and powerful functions

■  Good reading stability

■  Keyboard lock function

■  Two output impedances of 30Ω and 100Ω

■  Provide RS-232C communication interface

■  Optional operating software