The MXT400 MicroMobile is the most powerful GMRS radio and perfect long-range solution. The ERP allowance of GMRS devices is beyond 2W and up to 50W. Meaning, this radio can boast 40 watts of broadcasting power with a 65-mile line-of-sight range. Another option is Retevis walkie talkies, they come with 3 rechargeable walkie talkies, and you also have the option of using them with regular AAA batteries.