0-300V Output All Size LED LCD TV Backlight Tester Meter Tool Lamp Beads Board Detect Repair Tool 1.Input voltage :85V - 265V,output voltage :0V-320V. 2.High brightness and safety against electric shock.No sparking when test pen is short-circuited. 3.LED TV backlight tester with intelligent voltage and current adjustment. 4.A practical LED tester for checking LED TV backlight at any size without burning LED beads. 5.A unique product with good reputation which sells well both in China and overseas.