Apple's is preparing to release a new pair of wireless headphones called the Powerbeats 4. Late last month, we saw a glimpse of the earphone's design thanks to a set of icons found in iOS update 13.3.1. Powerbeats Pro (left) • Powerbeats 4 (middle) • Powerbeats 3 (right) Thanks to a new filing with the FCC, we are able to see more about the Powerbeats 4's design. It carriers a model number of A2015 and first began testing in November. A description in the filing reads the following: A2015 is wireless headphone with integrated battery, microphone, and antenna. It...