That looks like a hands-free headset that also doubles as earphones to play music, those are pretty common now. The oval button is to answer calls, and one is longer because it's basically an optional second ear piece to listen to music ...
A review of the BlueTrek Bizz, a Bluetooth headset which doubles as Micro SD reader. Simply remove the ear piece and plug into a USB port for data and charging.
What Are Bluetooth Headsets, What Are They For & How Do They Work? by Nick Janaw, bluetooth headsets, button function, ear piece, ear pieces, penalty points, incoming call, functionality, mobile phone, microphone, variations, pairs, ...