Motorola Gp399 Dual Band Uhf- Vhf RadioThe GP399 Series come with a dual push-to-talk button. The dual PTT is a huge leap forward in the HT technology. It allows you to transmit on two frequencies by the use of the rocker PTT switch. By pressing up you can transmit on “Frequency A” and by pushing down you can transmit on “Frequency B”. Frequency A or B can also be used as a scanner of channels, frequencies, CTCSS and DTS tones. VERSATILE RADIO FOR AMATEUR USE. The MOTOROLA GP399 is legal for use on amateur frequencies. The GP399 is able to Transmit on Narrow band (12.5kHz) and Wide band (25kHz) DUAL WATCH RECEIVER. The MOTOROLA GP399 has one built-in receiver but can “watch” two channels (semi duplex). Monitor two different frequencies (even on different bands (VHF/UHF)) and the radio will monitor both frequencies giving priority to the first station to receive an incoming call. FM BROADCAST STATIONYou can listen to the FM Broadcast radio, while still monitoring your radio frequencies in the background. Any incoming call will be given priority insuring you never miss an important call while listening to the radio. GROUP TONES SUPPORTED. The MOTOROLA GP399 supports the most common Analog Tones. It supports CTCSS, DCS, and DTMF calling methods. Set-up your calling methods to call by group tones. Tone calling (private line) is required by most repeater applications and the GP399 supports the latest standards Motorola Gp399 UHF/VHF Walkies Talkie Radio.