... 5ppmAntenna impedance50ΩOperate voltagerated DC7.4V TransmiterRF output powerhigh: 5W,low: 1WFM modulation modeF3EAdjacent70dB(Wide),65dB(narrow)Modulation limit±2. ... down, unless it is dedicated intercom dangerous areas (for example, Factory Mutual, CAS, or UL certified).To avoid electromagnetic interference / ... you to turn off the intercom, please observe. AT-UV2 Low price dual band two-way radio