... advantage: 1.Portable,lightweight 2.Useful and promotion 3.Customize 4.uniqueness LED light case Functions: upper cover:1Voltmeter,1 ampere meter ... show your lights.Using LED democase,You can test downlight,spotlight,led bulb,ceiling light,grill lamp,LED strip light.Tube light ... .powermeter,PFmeter,power consumption meter.Power Frequency meter.4.The size of LED display cases can be disigned 0.6m/1 ...