Radio TV Toolbar is a browser utility developed by Radio TV 2.1. It is compatible with all major web browsers and can run on Windows, Mac and Linux platforms. It helps you to find and listen a large variety of radio stations and TV channels. It also includes a search engine and a lot of useful tools (Calendar, Maps, Simple Calculator, Unit Converter, Translator). If you don't need it, you can't safely uninstall it:
Google Chrome and other Chromium-based browsers: type chrome://extensions in the address bar. Press the thrash can icon next to the Radio TV Toolbar.
Firefox: press Shift+Ctrl+A (or open Tools → Add-ons). Press Disable next to the Radio TV Toolbar. If you can't find the toolbar in the Extensions tab, switch to the Plugins tab and look there.
Opera 12.x and older: press Ctrl+Shift+E (or press the Opera button → Extensions → Manage extensions) to open the Extensions menu. Press Uninstall next to the Radio TV Toolbar.
Internet Explorer: open Tools → Manage Add-ons. Select the Radio TV Toolbar and press Disable.