Specifications: Supply:13.8 V Number of channels:40 AM: yes Channel selector:up / down Number of weather channels:7 Weather alert: yes Volume:Volume adjustment and ON/OFF Squelch:Manual squelch ASC: yes Display:LCD multifonction Frequencies display: yes S-meter:Digital Filter ANL: yes Filter NB: yes Filter HI-CUT: yes Scan: yes Beep Function: yes Roger beep: yes Key locking: yes Preset channel:EMG 1 and 2 microphone plug:front (6 pins) External loudspeaker jack: yes Size (W x D x H):4.02 (W) x 3.94 (D) x 0.98 (H) inches / 102 (W) x 100 (D) x 25 (H) mm Weight: 0.705 lbs / 0.320 kilograms Reception: Maxi. sensitivity at 20 dB sinad:0.5 microvolts minus 113 dBm Frequency response:300 Hz to 3 kHz Adjacent channel selectivity:60 dB Maximum audio power:2.5 W Squelch sensitivity:minimum 0.2 microvolts - 120 dBm, maximum 1 mV to 47 dBm Frequency image rejection rate:60 dB Intermediate frequency rej. rate:70 dB Drain:180 ~ 500 mA Transmission: Frequency allowance:200 Hz Carrier power:4 W Transmission interference:inferior to 4 nW (minus 54 dBm) Audio response:300 Hz to 3 KHz Emitted power in the adj. channel:inferior to 20 microwatts Microphone sensitivity:5,5 mV (elec.) / 2,2 mV (dyn.) Drain:1.7 A Modulated signal distortion:2 percent General: Number of channels:40 Number of weather channels:7 Weather alert: yes Modulation modes:AM Frequency ranges:from 26.965 MHz to 27.405 MHz Weather channels:from 162.400 MHz to 162.550 MHz Antenna impedance:50 ohms Power supply:13.8 V Size (W x D x H):4.02 (W) x 3.94 (D) x 0.98 (H) inches / 102 (W) x 100 (D) x 25 (H) mm Weight: 0.705 lbs / 0.320 kilograms Accessories supplied:power cord with fuse, 1 mounting bracket with fixing screws, Ultra light electret microphone with support