PULOX PO-650B Mode D'emploi page 110

0.1
1
10
100
For transmitters rated at a maximum output power not listed above,
the recommended separation distance d in meters (m) can be
estimated using the equation applicable to the frequency of the
transmitter, where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter manufacturer.
NOTE 1
for the higher frequency range applies.
NOTE 2
Electromagnetic propagation is affected by absorption and reflection
from structures, objects and people.
0.369
1.167
3.689
11.67
At 80 MHz and 800 MHz, the separation distance
These guidelines may not apply in all situations.
0.369
1.167
3.689
11.67
0.738
2.333
7.379
23.33