CA-300V LED Lamp Beads Light Bar TV Backlight Tester Capacitance Diode Voltage Testing Line Checker LED Lamp Board Test Tool Specifications: Material: ABS Adapter: EU Plug, US Plug (optional) Input voltage: AC 85-265V Output voltage: DC 0-300V Output current:28mA Power:12W Product size:94x57x31MM Features: 1. Wide Applications: This LED light tester suitable for one LED beads, light bars, LED string, LED panel and intergrated optical LED. 2. Capacitance&Diode Voltage Testing: This tool can be used for testing the capacitance voltage and diode voltage. Easy to Use: With this test tool, you do not need to disaemble the panel to test the LED backlights. 3. Automatically adapt to voltage and current and this tool can automatically identify lamp beads and light bars. 4. Double isolated safety protections and with the voltage and current intelligent adjustment function. Portable size and easy to carry, you can put it into your tool bags to carry. 5. LED digital display screen for you to read the testing data more clearly, you can get the testing data easily. Methods of use: Plug the red and black meter wires corresponding to the colour into the banana holder, with the red meter output being positive and the black being negative. Connect to the positive and negative poles of the LED bead or light bar. The number displayed on the digital tube is the voltage value output by the tester. The fault is judged by the voltage value at around 90% of the maximum withstand voltage value of the bead or strip and the condition of the strip. Note: 1) Please do not look directly at the LED light source for a long time when testing the LED tester to avoid injury to the eyes. 2)Please unplug the power supply or turn off the AC switch for a long time to prolong the service life. 3) Please do not touch both ends of the meter pen with both hands at the same time to avoid face power.