RPC-SP4D, which is a remote power controller, can control and monitor remotely an electric power into the connected less than 4 electric devices respectively which have less than 10 ampere current capacity such as a few CCTVs, lighting systems, electric sign, and entrance control systems. It is appropriate for the small & medium sized remote control network. The SP4D provides two separate input powers, each with two group outputs. (Total of four output power)