This is the big brother to the Uniden 510XL. All of the great features that you love about that radio are also found in this radio. Once again, it’s compact and able to fit into those tight little cubby holes found in or above dashes. It has squelch and ANL (Automatic Noise Limiter) filtering to reduce the background engine noise from inferring with your conversation. It also has an option for PA mode - which allows for public address horn speaker use typically mounted under the hood of your vehicle. No matter which way you transmit, your voice will be heard loud and clear. Also, if you find yourself in a bit of a jam, flip the button for Instant emergency Channel 9 access. The Uniden Pro520XL will help get the word out that you need help without any unnecessary fumbling of the dials.