Car, Boat, & Other Radios (Mobile & Fixed-Mount) Average Range Guidelines *WattageFlat Open Terrain (miles)Inside Buildings (floors)4 watts (UHF)4 – 625 – 305 watts (VHF)4½ – 610 – 1512 watt CB SSB (HF)8 – 15—How Far Can I Talk? | UHF vs VHF | The Truth About Range quality2wayradios.com › store › radio-range-distance