Diamond SRH320A 144/220/440 MHz Tri-Band Handheld SMA Antenna High quality, high gain HT antenna with flexible whip. Increase the performance on your handheld or wideband scanner with a Diamond SRH Series antenna.SMA male base. Diamond Antenna Tri-Band HT Antennas offer a wide range of features to choose from for your handheld transceiver or scanner. Whether you need a replacement antenna or want to improve your HT's radiating efficiency and range, these tri-band antennas offer a quality solution for your needs. Diamond rates their antenna gain figures against 'standard' HT antennas usually delivered with a new transceiver. This antenna gain method makes it easy to see how their antennas perform as a replacement for an original manufacturer's antenna. Many of these antennas also have excellent extended-receive coverage that's great for scanner use! Diamond Antenna Tri-Band HT Antennas are a quality and cost-effective solution.