Features 1. Check the Fault: LED TV backlight tester can test LED TV backlight and separate test TV constant current board, easily determine the LCD TV fault problem. 2. 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. 3. Easy to Use: LED lamp tester has a special additional lmA accuracy wide voltage (0330V) constant current source output, which allows you to develop various clever applications on your own. 4. Testing the backlight of LED at any size display the voltage, It can be tested in a long time, and will not damage the lamp beads.Safer with dual protection of power and tester Isolation.Pocket size which is very convenient for on-door appliance. 5. A practical tool for checking LED TV backlight problem at any size without burning LED beads and LED panel. Save time! Save money! Specification Material: ABS Color: Black, Red Package Size: 10 4 6 cm Weight: 254 g Plug Type: US, EU, UK, AU Package Include: 1x LED Backlight Tester 1x Manual