Automatic detection of output voltage and current. Can test any size LED backlight and light beads. High brightness, no need to remove the screen can judge the quality of the backlight. Features: Intelligent regulation of voltage and current. No burning lamp, no electric shock, reverse protections. High brightness, accurate judgment. Wide voltage, input and output barrier-free. Double isolation. High and low pressure can be switched. Multiple light sources can be tested: test any LED lamp strips, lamp board COB light source, lamp bead, etc. No need to remove the screen: test LED TV backlight and other LED backlight of any size without detaching screen. Test voltage: test the voltage parameters of various components, such as voltage stabilizing value of voltage regulator and voltage withstand value of electrolytic. Test circuit: turn-on and leakage of test circuit. Specifications: Material: plastic Color: white Power: 12W Input Voltage : 85-245V Output Voltage : 0-300V Item size : 98 * 60 * 32mm / 3.9 * 2.4 * 1.3in Package size: 110 * 65 * 40mm / 4.3 * 2.6 * 1.6in Package weight: 200g / 7.1ounce Packing List: 1 * LED Tester 1 * Power Cable 2 * Test Pen with Line 1 * User Manual