Main functional features and characteristics: Frequency range: (136 - 174 MHz, 400 - 512 MHz) Reception, Transmission FM audio band (87 - 135 MHz) Reception AM aviation band (118 - 135 MHz) Reception Built-in two sets of communication circuits for dual-band dual-reception signals Relay differential conversion function (U to V or V to U) 8 groups of CT voice frequency modulation encryption Foldable U/V full-band antenna Moving coil microphone selection Intelligent Chinese and English language prompts for operation functions equipped with shortcut function keys for operation mode Anti-tracking frequency-hopping transmission and reception 8 zones 128 channels storage mode PTT voice control switch Alarm shielding mode Personalized display mode upon startup (supports icon design) Maximum power output (10W - 15W) - quick switch keys for main/auxiliary (A/B) frequency bands Full dot matrix LCD liquid crystal 4-segment display Intelligent low-power power-saving mode for ultra-long standby time GPS global positioning system (latitude and longitude parameters)