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Protect your radio sets and the accessories against moistness, heat, dust and strong vibrations.
Avoid operating temperatures below -10°C or above +50°C. Do not expose the radio sets to direct
sunlight for a prolonged period (e.g. rear window shelf in the vehicle). Do not employ the radio
sets in the rain: however, if the radio set has become wet, switch it off immediately, take out the
battery pack/the batteries and dry it by means of a soft, lint-free cloth. Only employ the radio set, if
it is completely dry.
Never throw the battery packs/batteries into the re! Never short-out the contacts of the battery
pack!
Important information
stabo freecomm 450 is a PMR 446-radio set for voice radio over short distances.
The radio standard PMR 446 is assigned in AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE,
HR, HU, NL, NO, PL, PT, SE, SI (free of charge and without any registration).
There is obligatory registration in IT: Italian residents have to pay a nonrecurring charge
upon registration of the radio set! (Tourists may use their radio sets free of charge for the
duration of their stay in Italy.)
For information on national regulations concerning the use of radio sets on travels abroad
please contact the embassies/consulates of the corresponding countries or you may get the
information from the corresponding telecoms and postal regulator.
PMR 446-radio sets transmit/receive on 8 specied channels (446 MHz). Within the radius of
reach (max. 5 km) you can communicate via an optional number of radio sets, however, only
one person can talk and the other/s listen. Uncoded voice radio links are not condential!
The range is a function of many factors. Apart from the statutory transmitting power other fac-
tors are relevant: e.g. the position of the antenna (it should be installed at right angle and send
freely), the energy supply (fully charged battery packs fully exploit the reach) and above all the
environment where you transmit. Each “obstacle” (hills, buildings, trees) reduces the range;
some materials (e.g. reinforced concrete, pieces of rock) give rise for considerable screening
effects. Under optimum conditions (i.e. unobstructed view, e.g. in the open country, during sail-
ing or paragliding) PMR 446 radio sets have a maximum reach of 5 km. In housing areas a
range of 1–2 km is realistic, in strongly screened environment (e.g. in the mountains or inside
buildings made of reinforced concrete) the reach may drop to a few hundred metres or less.
