Below is general information on the Motorola DTR and DLR series 900MHz FHSS digital radios.  I am a user of the DTRs and the DLRs and have become a serious fan of them because they are professional quality and work amazingly well.  I own a small fleet of legacy DTR650 radios and a small fleet of DTR700 radios.  I have also previously owned a small fleet of DLR1060 radios.   DTR600/700: https://www.motorolasolutions.com/en_us/products/two-way-radios/commercial-business-two-way-radio-systems/on