DESC: General: Number of Features All: U.S.A., Canadian, International 10 NOAA Weather Channels . Channel Spacing: 25 kHz . Modulation: 5 kHz Max . Input Voltage: 13.8 VDC . Current Drain:: Stand-by: 200 mA . Receive: 300 mA . Transmit: 5 A @ High Power, 1 A @ Low Power . Temperature Range: -20°C to 60°C . Unit Dimensions: 6.25" x 2.25" x 7.125", (159mm x 57mm x 180mm) . Unit Weight: (Lbs)2 lbs., 6.8 oz. (1100g) . Receiver:: Frequency Range: 156.050 to 163.275 MHz . Receiver Type: Double Conversion Super-Heterodyne . Sensitivity: 20 dB Quieting: 0.35uV . 12 dB Sinad: 0.30 uV . Adjacent Channel Selectivity -60 dB . Intermodulation and Rejection -60 dB . Spurious&Image Rejection -60 dB . AF Output: 4 Watts @ 8 Ohms . Transmiter:: Frequency Range: 156.025 to 157.425 MHz . RF Output Power: 1 or 25 Watts . Spurious Emissions: -60 dB @ High Power . -55 dB @ Low Power . Microphone Type Electret .