As this is sold commercially I borrowed the idea and typically a Ham I modified it. The antenna is based on a retractable clothesline. The clothesline was replaced with #14 wire. Amazon.com: Kaito Radio antenna, T1: Electronics The red "alligator clip" to attach it to the radio's antenna. I added added a 3.5mm jack for radios which have a jack for external antennas. The jack requires having a male to male adapter with you. Typically the jack is better on receive than the red clip attached to the radio's antenna. As the wire can get tangled; choose a reel which can be taken apart easily.