LPD433 - Low Power Device 433 MHz band. Sometimes called SRD433 for Short Range Device 433 MHz band. Very low power short range 10mW 10milliwatts power limit. ITU Region 1 license free unlicensed service 433.035 MHz to 434.790 MHz ISM band (ITU Region 1 ISM only). May be used for data links, RC, garage door openers, remote sensing such as doorbells, wireless weather stations, etc. or voice. Narrow FM voice standardized for 69 channels starting at 433.05 MHz ending at 434.775 MHz. Note that datalink, telemetry and remote control or R/C systems do not have to follow the de facto standardized 69 FM voice channels frequency plan.
Like PMR446, LPD433’s allocation falls within the 70cm amateur radio band 420 MHz - 450 MHz.
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