The R/C hobby in the United States, Japan, and Europe typically employs FM radio control in HF and VHF bands such as 27 MHz, 35 MHz, 49 MHz, and 72 MHz. Spektrum systems are distinguished in that they use direct-sequence spread spectrum (DSSS) technology on the 2.4 GHz ISM band. Spektrum refers to their technology as "Digital Spectrum Modulation." Each transmitter has a globally unique identifier (GUID), to which receivers can be bound, ensuring that no transmitter will interfere with other nearby Spektrum DSMx systems. This works in a manner that both transmitter and receiver are constantly changing through the different frequencies of the 2.4 GHz range. The Spektrum system is also unique in that it offers "Model Match" in which each transmitter program for a particular flight model is bound to one and only one receiver. This prevents a user from flying his/her RC helicopter while the transmitter is still programmed for his/her RC airplane.
Spektrum is the original application of 2.4 GHz spread spectrum radio systems to radio control models. It was originally developed by Paul Beard.