1、Voltage and current adaptive output without adjustment. 2、Support lightinfg multiple types of s-ingle LED beads. 3、Soft s-tart with eye-Protections and brightness gradient output. 4、Support positive and negative electrode test pen short circuit protections. 5、Support lightinfg multiple types of series-parallel connection LED light bars. 6、No need to remove the screen: test LED TV backlight and other LED backlight of any size without detaching screen. 7、Button type bracket structure design. Used for testing all kinds of LCD TV LED backlight, LED lighting lamps, LED advertising light box, etc. Features: Voltage and current adaptive output without adjustment. Support lightinfg multiple types of s-ingle LED beads. Soft s-tart with eye-Protections and brightness gradient output. Support positive and negative electrode test pen short circuit protections. Support lightinfg multiple types of series-parallel connection LED light bars. No need to remove the screen: test LED TV backlight and other LED backlight of any size without detaching screen. Button type bracket structure design. Specifications: Type: with digital display, without digital display (optional) Material: plastics Color: white+yellow Output current: ＜30mA Output Voltage : 0-200V Item size : 145 * 85 * 35mm / 5.7 * 3.3 * 1.4in Item weight: 167g / 5.9ounce Package size: 180 * 110 * 50mm / 7.1 * 4.3 * 2.0in Package weight: 253g / 8.9ounce Packing List: 1 * LED Tester with Power Cable 2 * Test Pen with Line 1 * User Manual 1 * LED Tester with Power Cable 2 * Test Pen with Line 1 * User Manual