Features: BananaJack, not terminal type, with safer and stable probe insertion. Two levels of current setting. When testing a small amount of light beads, it is recommended to use the MIN MODE. The output voltage and current are adjustable, and when testing a singleLED, the voltage and current automatically adjust to output. Support TV LED backlight test without take the screen apart. One button to turn on/off, and simple design for convenient operation. Support singlelight bead illumination function and slowstart. Built in isolation transformer, isolated without electricshock, reverse connection without burning lamp beads.   Support dual data display of output voltage and current.   Specifications: Material: plastics Input voltage: AC85-265V, 50/60Hz Output voltage: DC0-320Volt Output current: 0-38mA Item size: 141 * 82 * 39mm / 5.6 * 3.2 * 1.5in Item weight: 179g / 6.3ounce Package size: 175 * 120 * 60mm / 6.9 * 4.7 * 2.4in Package weight: 290g / 10.2ounce   Package List: 1 * LED Tester 2 * Test Pen 1 * User Manual