This is what I initially thought as well, having built an ISM band transceiver around the 350/400 MHz bands a few years ago. I recalled much lower power limits.
(I had posted something along the lines of "there's no way in hell the FCC would let you transmit at half a watt" but have since edited).
Apparently the 900 MHz bands are different, and the FCC has rules governing output power going into the antenna (1 watt), as well as an effective radiated power (which essentially places limits on your antenna gain) (4 watts).
(I had posted something along the lines of "there's no way in hell the FCC would let you transmit at half a watt" but have since edited).
Apparently the 900 MHz bands are different, and the FCC has rules governing output power going into the antenna (1 watt), as well as an effective radiated power (which essentially places limits on your antenna gain) (4 watts).
[1]: http://www.afar.net/tutorials/fcc-rules/