Persistent Systems has started accepting orders for a push-to-talk upgrade for its MPU5 radio.

The Dual Channel Push-to-Talk accessory “allows the user to quickly and easily select between 16 talk groups, as well as control volume levels for each talk group independently,” said a Persistent news release.

“When paired with a stereo headset, the two selected talk groups are heard in the left and right ears, and the volume level in each ear can be controlled independently.”

The Dual PTT lets a single radio communicate with two talk groups simultaneously rather than needing two land mobile radios.

“This is possible because the MPU5 is an IP radio, where talk groups are multicast addresses, instead of an LMR radio, where channels are different RF frequencies,” Persistent said.

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