A decent pair of Bluetooth sunglasses for under $17.

WONFAST Bluetooth Sunglasses + Free Replaceable 3 pair lens (Yellow,Brown,Clear) - Red frame. Here are the features listed on Amazon: (We didn't correct any of the grammar.)

Support both headset and hands-free profiles, calling voice and Reporting phone number function when calls coming. Bluetooth 4.1 Music sunglasses ,can listen music, Bluetooth 4.1, Support iPhone iPad iPod Samsung HTC Sony Smart Phone PC Tablet. Auto switch to phone talking mode when making and receiving calls, Support Mp3 can listen music, With Previous/Next Song control, Volume Up/Down control. Made of polarized lenses , it has the function of anti-rays, no glare and good eye health care. Hi-Fi earphones built directly on to the frame, and can be adjusted 270 degree for comfortable fit. 

My cohost Chad Johnson showed these on the Giz Wiz Show, and I was impressed enough to immediately buy a pair. The phone audio is just okay, but I was impressed with the music playback. And not only can you flip up the sunglasses lenses, it comes with 3 extra sets in various colors, plus a small screw driver to change them. They are available in many different frame colors which you'll see on the Amazon page. 

They were still $16.88 & Amazon Prime on 1/20/17 here: http://amzn.to/2adJRSk

That's a Giz Wiz link above. You pay exactly the same as everyone else but Amazon gives a small credit to buy more stuff for the show.