NEW YORK (TheStreet) -- Amazon (AMZN) - Get Report announced several new features Tuesday for its Fire TV and Fire TV Stick, most notably allowing users to listen on headphones.

In addition to enabling Bluetooth wireless headsets, the upgrade will allow on-the-go users to connect to WiFi in places like hotel rooms, where authentication is required, Amazon said. The Fire TV and the Fire TV Stick, a tiny device that plugs into TVs to enable streaming of movies and TV shows from the Internet, will also let consumers use a USB device to store apps and games. 

"We've been working hard to build more of both as quickly as possible, and we're excited to be adding new features we think customers will love," Peter Larsen, the company's vice president of devices, said in a statement. "In the UK and Germany, Fire TV is already the best-selling streaming media box on Amazon."

Amazon is rolling out curated Prime Music playlists to the devices, as well as new shortcuts to put them to sleep, for instance. There will also be a new hidden PIN entry screen so that others don't see the PIN as it's entered.

The upgrades, which will be included in an over-the-air software update, are important for Amazon as the Web-based retailer's TV products compete with services and products such as Roku, Google's (GOOG) - Get Report Chromecast, and Apple's (AAPL) - Get ReportAppleTV set-top boxes. Amazon did not specify when the update would be released.

Beyond the software enhancement, Amazon is starting to sell the Fire TV Stick in the United Kingdom, Germany, and Austria. The company is offering special discounts to UK consumers who purchase the stick in the next two days, but after that, it will cost £35. The Fire TV Stick will start shipping in both the UK and Germany on April 15.