For switching up to 4 different appliances, lamps or motors by means of a computer program. Appliances with operating voltages of 6~24V, max. 2A direct current can be controlled. By means of the enclosed software it is possible to switch on and off appliances at certain times, specific switching sequences (also for several days) can be programmed, running light effects etc. The module is connected at the printer port of a standard PC-AT from '486 on. Diskette 3.5" enclosed.