LPD433
From HFUnderground
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 or voice. Narrow FM voice standardized for 69 channels with 25 kHz channel steps.
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Like PMR446, LPD433’s allocation falls within the 70cm amateur radio band 420 MHz - 450 MHz.