An indispensable test device for the home, office, workshop, technical sales etc. You can use the tester to check the illumination function of 230 V energy-saving and standard lamps with E14/E27 screw threads and GU10 bayonet sockets. Bulbs for 6 – 24 V and switches, fuses, cables etc. can be tested for continuity. Tests for standard and rechargeable batteries round off the range of multi-functional applications for which the test device can be used.