... and diode. 4.Good Quality DT266 is portable,9v battery operated,LCD display and 3-1/2 digits(2000 counts) digital ... overload protection and work with 500v insulation tester. Its one hand operated rotary switch let you select the function and measurement ragge ... x Manual 1 x 9V battery. Packing list: 40pcs/ctn,g.w.:17kgs,n.w.:16kgs,meas:51*28*52CM Digital ...