Utilizing TDMA technology with two alternating time slots within a single 12.5 kHz. In other words, the repeater can handle two separate QSO’s simultaneously within the bandwidth of 12.5 kHz. In effect, it’s like having two repeaters in one. Talk about spectral efficiency! A repeater must be used in order to take advantage of the two time slots (two virtual channels). The radios also come standard with the capability of text messaging via the keypad or enhanced palm mic. As an added plus, you can verify if the target radio of which you would like to communicate with is on and in range before attempting to call the operator and or sending it a text message.