inputs.text: range midland gxt500 14 mile walkie talkies - used walkie talkie harsh environments construction building maintenance rooftops blazing heat extreheme cold able communicate party rooftop car approx two half miles wave pattern basically un obstructed perform well buildings transmited received verbal messages basehement building metal beams two three floors depending doors windows sent received messages lower channels better worked around power tools disturbed operation frequencys tools create not know perform better around 12vdc tools extreheme conditions high heat sub zero weather would best keep walkie talkie insulated kept mine inside large polyester fill mitten antenna sticking front pocket chest pocket vest would even better body heat greater around heart extreheme heat high roof top would keep canvas sleeve painted light green white reflect heat away unit situations exposed paint sheetrock dust debries would simply wrap plastic shoping bag around use blue green painters tape keep paint dust buttons speaker areas well ventalation holes electronics within hope useful