Chances are, you still have a few older media players or speaker systems lying around that don't have Bluetooth built-in. Instead of junking them, upgrade them with these cheap adapters.

Note that the $15 adapter is a receiver (for, say, an old iHome), and the $30 one is a transmitter (for an old MP3 player, for example).

More Deals:

Today's Best Deals: Popular Headphones, 4K TV, Label Maker, and More

Commerce covers the best products on Kinja Gear, finds you deals on those products on Kinja Deals, and asks you about your favorites on Kinja Co-Op, click here to learn more. We operate independently of Editorial and Advertising, and if you buy something through our posts, we may get a small share of the sale. We want your feedback.