With the aid of this test module it is possible to carry out tests with all types of light emitting diodes in order to check function brightness colour & polarity. The LEDs can be tested with different currents approx. 1m A 2.5m A 5m A 10m A 20m A & 50m A. In order to facilitate selection of LEDs of equal brightness two test sockets with the same current 10m A have been placed side by side. Requires 1x 9V PP3 battery Order Code L46AL.