High brightness and high voltage output, compatible with LED lamp beads, LED lamp string, LED panel, integrated optical LED and other lamp panel lighting. Display output voltage and output current. The voltage and current are intelligently adjusted. Automatically adjusted according to the number of LED lights to prevent burnout. Support testing capacitor voltage and diode voltage. You can test LED strips without disassembling the panel, which can a lot of time. Safety protection: double ( and cold) isolation. Safety design: slow boost, soft start. Steadily increase the current. The gradually brighter light protects your eyes. This LED TV backlight tester can find the defective LED on the light bar within a few seconds through automatic voltage and current adjustment. If there is a problem with the LED light bar, you can replace it or replace the bad LED light bead. Suitable for any size LED TV, perfect backlight inspection and maintenance tool. Output voltage: 0-230V Output current: 0-25mA Voltage: AC220V Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Colour:As Shown Material:plastic Package Contents: 1 x Tester 1 x Test cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.