Description: High speed single chip microcomputer is used for voltage sampling test, and the LED light is driven to display the voltage to realize the integration of boards and cards and reduce the defective rate. 0-300V adaptive voltage, suitable for testing most series and parallel lamp beads. During the test, the gradual start up method is adopted, the voltage is automatically adapted, the current is gradually increased, and the lamp beads will never be burned, and the normal brightness can be reached after three to five seconds. The positive and negative poles of the light bar and lamp bead are reversed, and the light bar and lamp bead will not be burned. Digital display real time voltage output, with adjustable voltage inside, the voltage value can be corrected by itself. Insulated from hot and cold, never get an electric shock. The power cord and machine box are designed in one piece, which is easy to carry when going out. You can light up the LCD TV screen without dismantling the screen. When testing, please do not look directly at the lamp bead due to the bright version. so as not to damage the eyes. Specification: material: plastic Type:Industrial Computer Accessories Model r:TV Backlight Testing Instrument Plug: UK Plug Size Chart: 10.4cmx3.6cmx6.3cm/4.09inchx1.42inchx2.48inch Package Includes: 1  LED Lamp Bead TV Backlight Tester Note: Please allow slightly errors due to manual measurement and different monitors.