Features: Testing LED TV backlight and other LED backlight of any size without detaching screen. Automatically identify lamp beads and light bay. Can test light beads and avariety of good and bad light board and light bar. With help of this tool, you can know the LED LCD screen backlight problem quickly.High brightness and safety against electric shock.No sparking when test pen is short-circuited.Intelligent adjustment of output voltage and current against electric shock .A practical tool for checking LED TV backlight problem at any size without burning LED beads and LED panel.Save for time! Testing the display voltage of LED backlight in any size, testing arbitrarily, connecting back will not damage the lamp beads, safe and reliable. abs material for shell color, comfortable feel, lightweight, easy to carry. he is a good assistant to the electrician. 3-110V output, multipurpose, high Luminance and double for protection. Specifications: Material：ABS Plastic Size：83x68x43/3.3x2.7x1.7 inches Package Includes: 1 * LED Tester 2 * Test Line note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.