The industrial, scientific and medical (ISM) radio bands are radio bands (portions of the radio spectrum) reserved internationally for the use of radio frequency (RF) energy for industrial, scientific and medical purposes other than telecommunications.[1] Examples of applications in these bands include radio-frequency process heating, microwave ovens, and medical diathermy machines.

Short Range Devices (SRD) is a ECC Recommendation 70-03 which describes radio frequency transmitter devices used in telecommunication for the transmission of information, which have low capability of causing harmful interference to other radio equipment. Short-range devices are low-power transmitters typically limited to 25–100 mW effective radiated power (ERP) or less, depending on the frequency band, which limits their useful range to few hundred meters, and do not require a license from its user.


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