Vktech Mini Handy LED Tester Test Box 2~150mA for Light-emitting Diode Bulb Lamp Handy device for testing LED's (2-150mA) The top row is for 2 pin LED's with currents ranging from 2mA - 30mA Lightweight & compact Powered by a 9V PP3 battery (not included) Item size: Approx. 8*5.5*2.2cm(L*W*H)