If you can operate a PC, can connect these remote control via USB to the PC and rename it by Harmony app the devices to be controlled. All relevant codes - also of very old equipment - are assigned to the keys correctly and automatically. Then you put yet clear what to do if one wants to see TV-such as what devices are to be turned to and which device should take over the volume control. And then it all works already. Very nicely done and simple: a popular remote control plane. Who wants to control more than 4 devices need the Harmony 350, who wants to program itself different scenarios, can get the more significant Harmonys.