Motorola RDX two-way radios are available in UHF and VHF models so they can be used both indoors and outdoors. They can last up to 26 hours with a high capacity battery and 12 hours with a standard capacity battery. THey meet Military 810 C, D, E and F standards (water resistant, dust resistant, shock, 5 foot drop test on concrete). Motorola RDX radios are all repeater capable and come with a free software download, but the programming cable needs to be purchased. Best of all, two way radios have NO MONTHLY FEES!