1、LED Backlight Tester: Digital display real time voltage output, voltage internal adjustable, voltage value can be self‑corrected. Using this tool, you can quickly use LED backlight problems. With this function, the working voltage can be used exactly. If there is a problem with the LED lamp set, you can use it or replace the broken LED lamp bead. 2、0‑300V Adaptive Voltage: Suitable for most series and parallel lamp beads testing. During the test, the gradual start method is adopted, the voltage automatically adapts to the gradual increase in the current, and the lamp beads will not be burnt, and the normal brightness can be reached after three to five seconds. 3、LED Lamp Beads: Cold and heat isolation, never electric shock, integrated design of the power cord box, easy to carry; no need to remove the screen. Do not look directly at the beads during the test, so as not to damage your eyes. With this function, the working voltage can be used accurately. 4、Lamp Board Repair Tester: Turn on the dual LED light bar backlight. LED lamp bead checker, cable tester LED and TV backlight tester are suitable for all LED lamp repair output 0‑300V. 5、Main Function: 30 seconds after the end of the test, the tester will automatically sleep without electric shock, short‑circuit the test lead to wake up. Manually set the 1mA mode, which can be used to test the forward and reverse withstand voltage of capacitors, zener tubes, diodes, transistors, MOS tubes, LEDs and other components. Item Type: LED Backlight Tester Material: PVC + ABS + Copper Color: As Pictures Shown Weight: Approx. 356g / 12.6ozOutput Voltage: 0-300V (Adaptive) Output Current: 1mA-300mA (Can Be Set)Product Maximum Power: 90W Function: 1. 30 seconds after the end of the test, the tester will automatically sleep without electric shock, short-circuit the test lead to wake up 1 x Tester 2 x Test Pen