digital Amp meter 1.with 5selected ranges 2.with 4 terminals 3.large output constant current 4.used for AC/DC digital Amp meter Features3½LCDl display,directly and clearlyAuto-ranging from0~20mARound metallic case for preventing corona dischargeEasy to install and operatePreventing from leaking,bearing large current shock(up to 5kA/8µs)Battery powered.(9V6F22battery)Accuracy ±(1%RDG+2d)Power ...