All the receivers we carry come with at least a built in 1- or 2-watt radio. Our E800 has an internal 5-watt radio for a range of 10-12 kms. The typical range for our units is 5 – 6km in ideal conditions. If you need to go farther than this, AMS offers many options to extend your range, whether you need a base booster radio like the TRU35, or a network option like NTrip Caster, we have what you need to get the job done.