The differences between the first and second models of Apple’s AirPod earbuds are small but significant. Here they are, and how to tell which version you have.

At a quick glance, you won’t notice any visual differences between the two base AirPods. They’re the same size and weight. But the 2019 AirPods 2 have some updated hardware inside that might make them worth swapping out for if you already own the 2016 model. Here’s a quick rundown of the changes.

The original AirPods, along with some Beats headphones, use Apple’s W1 chip. Later versions of this processor appear in the Apple Watch.

The newer H1 processor is Apple's current standard for its audio devices. In addition to 2019's AirPods, you'll find this chipset in Airpods Pro, AirPods Max headphones, and other Beats headphones like the Powerbeats and Powerbeats Pro.