UT651B is a Handled Lamps Tester, It is an Ideal Tool for Families, Offices, Schools and Factories to Test and Repair the Lamps, Can Test quickly different kinds of Lamps like Low Pressure Sodium Lamp, High Pressure Sodium (≤110W), Neon Lamp, Energy-Saving Lamp, Electrodeless Lamp, Fluorescent Lamp, Mercury Lamp, etc. It has the on-off Function to Test the Working Condition of different kinds of Lamps, It Has Flashlight Function to make it to be used in the Dark, It has Whip Antenna itself, makes the Lamp be Tested without tearing down the Modulator Tube.