Uniden® Professional Series 40-Channel Compact CB Radio, PRO510XL

40-channel access so you can navigate the complete range of channels for full coverage of CB stations Power output: 4 watts; audio output: 7 watts max. into 8 ohms Instant Channel 9 for quick access to emergency channels Frequency range: 26.965 MHz to 27.405 MHz; frequency control: Phase Locked Loop (PLL) synthesizer I.F. frequency: double-conversion superheterodyne Volume control and AGC (Automatic Gain Control) for a constant sound level; less than 10 dB change in audio output for inputs from 10 microV to 50,000 microV ANL noise limiter, ANL switch, and squelch control fine-tune performance and eliminate noise Signal/RF power indicator lets you check the relative strength of incoming transmissions 5-watt internal speaker; external speaker jack so you can plug in an external speaker (sold separately) for better sound Operates on 12-volt power; antenna connector: UHF, SO-239; impedance: 50 ohms, unbalanced Operating temperature range: -22°F to 122°F Dimensions: 4.5 in. W x 1.375 in. H x 6.75 in. D Weight: 1 lb. 9 oz. Includes front-mount microphone and hook, mounting hardware, mounting brackets and knobs, and owner’s manual