1、NO DISASSEMBLY: This LED tester can test any size TV LED backlight brightness high, no need to remove the screen to determine the backlight bar is good or bad, very convenient. 2、STABLE AND INTELLIGENT: LED tester adopts soft start mode, the current slowly becomes larger, the voltage is automatically and intelligently adjusted, no burning of lamp beads and no electric shock. 3、STRONG COMPATIBILITY: Any LED backlit screen, such as TV, computer, cell phone, navigator, etc., are compatible and can be lit continuously, without limitation of lighting time and test times. 4、SAFETY TEST: This LED tester can safely monitor no matter single LED beads, light boards, light strings, or integrated light sources. 5、PORTABLE TOOL: This LED tester is small and portable, easy to repair, no need to remove the screen can also save a lot of time. Item Type: LED Light Tester Material: ABS Output Current: ≤0.15mA (starting current)-30mA Output Power: ≤50VA AC Switch: Yes 1 x LED Light Tester 1 x Black Test Pen 1 x Red Test Pen 1 x Power Cable 1 x Instruction