1、This led tv backlight tester is capable of testing the backlight display voltage of LED of any size for a long time without damaging lamp beads. 2、Smart adjustment of voltage and current. 3、Adopting dual insulation design to protect you from electric shock. 4、High brightness prevents this led light tester from being disassembled. 5、High strengthen and flame retardant material ensure a safe measurement. Features: Adopting dual insulation design to protect you from electric shock. High brightness prevents this led light tester from being disassembled. High strengthen and flame retardant material ensure a safe measurement. Specification: Product type: LED Light Tester Material: ABS Dual insulation design: Support Multi-level protection: Support Package size: approx. 15 * 8 * 4 cm/ 5.9 * 3.1 * 1.6 in Package weight: 227g/ 8.0oz Package List: 1 * LED Light Tester 1 * User Manual 1 pair of Tester Connectors Notes: A. LED TV back-light testing without disassemble the screen. B. Testing of LED strip, LED panel, COB,integrated LED light source etc.( DO NOT LOOK DIRECTLY SINCE THE HIGH BRIGHTNESS.) A. Testing of single LED bead, LEDstrip, COB, integrated LED light source. D.Determine the " +" and " -" of LED.( LESS THAN 2 SECONDS TO SINGLE LED BEADS.) If you are used to test the LED finished lamps, please disconnect the power supply before! Because it is likely to form a loop, resulting in abnormal test.