ALL SUN EM480B Audio Impedance Tester Portable Insulation CATIII Test Ranges 20/200/2000 Resistance Meter 1KHz Timer Function Data Hold

Features: True measurement of speaker systems actual impedance at 1kHz. Three test ranges (20 / 200 / 2000) allow testing of home theater and commercial sound systems. Convenient protable battery operation. Low battery indication. Data hold function. Timer function for easier operation. The timer can last about 30 secondsminutes after users press TEST button. Auto power off: after about 15 minutes of nonz- use. Accuracy is specified for a period of one year after calibration and at 18 to 28 with relative humidity