A lightweight, shock-resistant splash-proof design and an extended operating time make OMK-3xV2 test kits ideal solutions for field use. A switchable adapter system on the light source with a universal push-pull (UPP) adapter on the power meter handles all 2.5 mm connectors (1.25 mm as an optional accessory). It makes the OMK-3xV2 test kit ready for every connector type in the field.