High gain, + receive to 900 MHz. The Diamond RH77CA is an HT antenna for transmit on 2 meters and 440 MHz. It is a 1/4 wave on 2 meters and a 1/2 wave on 440. It can additionally receive these bands: 120, 150, 300, 450, 800 and 900 MHz. As a result of this exceptional coverage, we actually sell more of these antennas to scanner listeners than hams! It is a favorite model for scanner enthusiasts, and for those using the new breed of wideband handheld radios.