4 watts* front facing speaker delivers clear and loud audio throughout a vehicle’s cabin. In addition, the digital modulation provides distinct clarity even at the fringes of the communication range. When you change the operating channel, the radio announces the channel number. Convenient for making radio adjustments without having to look at the radio. In the multi-site trunking mode, if the signal condition worsens as the radio user moves, the roaming scan automatically finds a new site to retain the communication link and quality.The tough aluminum die-cast chassis and polycarbonate front panel have been tested to the MIL-STD-810 environmental tests.