Feature: 1. Safety Testing: The test is done in a progressive start mode, the voltage automatically adapts and the current gradually increases, never damaging the lamp beads due to excessive current. 2. LED Lamp Bead Tester: This tester's input voltage is , output voltage is 0‑, power is 18W, no need to remove the screen can determine the backlight is good or bad. 3. Removal Free: This tester can light up the LCD TV screen without removing the screen, which is more convenient and saves time. 4. Digital Display: The tester has a digital display with real time voltage output, with adjustable voltage inside, and the voltage value can be self corrected. 5. Strong Performance: This tester hot and cold ground isolation, never electrocution, power cord and the box in one design, easy to carry out. Specification: Item Type: LED Lamp Bead Tester Material: ABS Power: 18W. Package List: 1 x LED Lamp Bead Tester1 x Red Test Pen1 x Black Test Pen1 x Instruction Note: Please use 19V voltage to detect the positive and negative poles when you are not sure about the positive and negative poles, voltage detection is prohibited, voltage may cause damage to the equipment, short the capsule pen positive and negative three seconds to switch between high and low voltage