will operate on (8) frequencies in the 446Mhz range and (5) in the 464Mhz range. The 708
operates on 446Mhz. Please note that the links provided mention they operate in "public frequency band" of South Africa. These radios were not intended to be used in other countries. See below for more.
In the U.S.(and many, many other countries), the 420Mhz - 450Mhz frequency range is set aside by the FCC (and other bodies) for licensed operation by amateur radio operators. Portions of the 460Mhz range is set aside by the FCC for use by Public Safety Agencies - mostly local police and fire departments. In the U.S., the Family Radio Service (FRS is 462Mhz) is an unlicensed band and General Mobile Radio Service (GMRS is 467 Mhz) requires a licensed.
As you might have guessed, unlicensed or unauthorized transmissions are ILLEGAL. You may be fined, imprisoned or both if caught by the FCC. If using these radios in a location other than South Africa, consult that county's communication authority BEFORE transmitting. You cannot transmit legally in the U.S. with these radios.