President Electronics THOMAS FCC 40-channel AM/FM Radio, Black; 12/24 V, Up/down Channel Selector, Volume Adjustment, Manual Squelch and ASC, Multi-functions LCD Display, Mode Switch AM / FM Key Features: - 40 channels AM / FM - 12 / 24 V - Up/down channel selector - Volume adjustment and ON/OFF - Manual squelch and ASC - Multi-functions LCD display, Backlight colors include: Red, Green, Dark Blue, Light Blue, Yellow, Purple and light Purple - Preset channel programmable - Front microphone plug and External loudspeaker jack - TOT (Time out timer) - S-meter, Public Address, Scan, Talkback, Compander, beep function, roger beep Specifications: - Number of Channels: 40 - Modulation Modes: AM / FM - Antenna Impedance: 50 ohms - Power Supply: 13.8 V / 27.6 V - Overall Dimensions (WxDxH): 4.92" x 6.89" x 1.77" - Weight: 1.9 lb - Accessories supplied: Ultra light electret microphone with support, mounting cradle, screws - Filter: ANL (Automatic Noise Limiter) built-in - Frequency allowance: +/- 200 Hz - Carrier Power: 4 W AM / 4 W FM - Transmission Interference: inferior to 4 nW (- 54 dBm) - Audio Response: 300 Hz to 3 KHz - Microphone Sensitivity: 7 mV - Drain: 1,7 A at 13,2 V / 0,85 A at 26,4 V - Signal Distortion: 2 % - Max. Sensitivity at 20 dB sinad: 0,5 µV - 113 dBm AM / 0,35 µV - 116 dBm FM - Frequency Response: 300 Hz to 3 kHz - Adjacent Channel Selectivity: > 60 dB - Maximum Audio Power: 2.5 W - Squelch Sensitivity: minimum 0.2 µV - 120 dBm, maximum 1 mV - 47 dBm - Frequency Image Rejection Rate: 60 dB - Intermediate Frequency Rejection Rate: 70 dB