Langhans was given a set of VHF business-band radios on the frequency of 154.57 MHz which became known by the trade as "blue dot" radios. Costco Wholesale use Motorola DTR600, DLR1020 and Motorola curve on frequencies 1 for general use Among employees and 2 for communication with major sales department Walmart and Sam's Club use a two way radio, made by Motorola Solutions, model Motorola RDM2070D, which is exclusive to Walmart and Sam's Club. The Motorola RDM2070D is preprogrammed on MURS frequencies with most channels using CTCSS tone 21/4Z/136.5Hz. See also Business band Family Radio Service General Mobile Radio Service Public Radio Service Unlicensed Personal Communications Services References External links FCC Wireless Services: MURS Home MURS Rules Summary Bandplans Radio communications Radio regulations