A wireless control system that operates in Industrial, Scientific and Medical (ISM) frequency bands that employs one or more variable power dual modulation radio frequency transceiver-controllers that are capable of receiving and/or transmitting signals and communicating with each other over a configurable range, from short to long range. The wireless control system is suitable for use in a wide range of medical, industrial, agricultural, military and commercial applications, including, for example, the management of irrigation systems, manufacturing processes, security systems, sewage treatment and handling systems, hospital management systems, tracking systems, ground telemetry systems, environmental monitoring systems for agriculture, viticulture, pipelines and dams, HVAC management systems, water, gas and electrical metering, parking meters, asset and equipment tracking, traffic control, fire protection, public space management, intruder detection and biological research.