Uniden PRO510XL Pro Series 40-Channel CB Radio, Compact Design, Backlit LCD Display, Public Address, ANL Switch and 7 Watts of Audio Output, Unique PLL Circuit, S/RF LED Meter, 40 Channels Microelectronics Integrated Into A Euro-style 2-way Radio Anl Switch 40-channel mobile CB radio with superheterodyne circuit/phase locked loop for precise control Built-in automatic noise limiter and squelch control to eliminate noise and improve communication Signal/RF meter and LED indicators to monitor activity at a glance Front-positioned microphone with extra-long, coiled cord for convenient use Ultra-compact unit for easy mobility; two-year manufacturer's warranty