ITEM NAME:LED Tester Box Mini Light-emitting Diode Piranha tester BOX 2~150m Nj Features: -LED Handy Test device, simply plug your LED into the correct holes (all of which are marked) and push the button to see its brightness, illuminant color etc. -Handy device for testing LED's (2-150mA) -Simply plug your LED into the correct holes (all of which are marked) and push the button to test its brightness, illuminant color etc -The top row is for 2 pin LED's with currents ranging from 2mA - 30mA -The bottom row is for 4 pin LED's (piranha LED's) with currents ranging from 20mA - 150mA.The bottom row is for 4 pin LED's (piranha LED's) with currents ranging from 20mA - 150mA. 1 x LED Tester. -LED Handy Test device, simply plug your LED into the correct holes (all of which are marked) and push the button to see its brightness, illuminant color etc.