While GMRS has a *50* watt max legal power, the bubble pack cheapies have anywhere from 300 mW to about 3W output. Nautrally, you require a license for GMRS. GMRS and FRS frequencies are crowded, with lkots of interference. I use 900 Mhz FHSS radios now, which work well. You should expect better performance from MURS, as most of the stuff out there is commercial grade.