Equipped for Multi-Function Testers MFT-4 the LS3 consists of a base board with rubber footing, one, two, or three MFT charging racks and a power supply. The double and triple type come with a power supply that has an additional heat sink attached to the casing. In the configuration for ICP-3 instead of MFT charging racks the corresponding charging blocks are installed on the LS3 base board.