Installation is very simple, a unit "receiver" and a "transmitter" unity even need to leave the note to set everything up. Each unit requires a 220V outlet. Side operation, the receiver is installed 5m and captures very well the infrared signal of remote controls. Communication between the two units is by radio frequency. Convenience, no need to bend the back to control its devices (players, amplifiers, ...) installed in unusual places. I would add, but this concerns only my personal opinion, a positive point for the design: the little black pyramid, sober and discreet, more like a decorative element as a useful device.