No antenna to test rx/tx but turns on all digits on channel display have all segments and meter light works, static can be heard through internal speaker depending on squelch. All knobs turn effortlessly with no greediness or resistance very nice radio smoker free home when put on a dummy load this thing really swings with a low dead key. The radio features 40 channels and an automatic noise limiter (ANL) for clear communication. It has a sleek chrome color and is a mobile/in-vehicle radio, perfect for road trips and emergencies. The radio is untested and has all the watts of power. Made in Taiwan, this Cobra 140 GTL is a rare find for any CB radio enthusiast.