Here is amperage at 12v. Get out a calculator or sharpen a pencil to covert to watts.
.32 amp cm9 bandwidth test 37mbps
.24-.29 amp cp9 regular ping
.22-.29 amp cm9 all idle
.22 sr5 disabled
Yes. .32 is 320ma. We do a little bit of router-OS wireless for specific situations. Mostly still using Alvarion and Trango. I just inserted a digital multimeter inline with a wallwart to get the power measurements.