Google has a USB Type-C digital to 3.5 mm headphone adapter for sale on the Google Store and it looks like it has now dropped in price down to only $9. Before today, or whenever it was that the drop in price first occurred, this same adapter was on sale for $20. So this is a fairly substantial drop in price. More to the point, the new price of the adapter is not listed as a 'sale price' and therefore, is assumed to be the standard price for this adopted going forward.
Which will likely make a lot of new Pixel 2 and 2 XL owner's happy. As the reason Google is selling a USB-C Digital to 3.5 mm headphone adapter on the Google Store is that its latest Pixel 2 phones do not come with a 3.5mm headphone port included. Unlike the predecessor of both models, Google has opted to omit a headphone jack this time around in favor of people using the new Pixel 2 phones with a Bluetooth pair of headphones, or with a USB Type-C set of headphones. Thereby Google has now also joined the number of other manufacturers who seem intent on sending the 3.5mm jack port the way of the dodo.
It is worth noting that regardless of whether these adapter costs $20 or $9, Google does include the same adapter in the box with all Pixel 2 and Pixel 2 XL purchases. So this is not something that a new Pixel 2 buyer needs to consider picking up right now, or as a matter of necessity. However, in the case that a spare one is required for work or for another location, or just in case the original one is lost at some point, the reduction in price is going to be a big motivator for those new Pixel 2 owners to get the adapter from Google, instead of buying a cheaper third-party option from elsewhere. Other than actually using the adapter to connect a 3.5mm pair of headphones to the new Pixel 2 phones, this one does not do much else. Although the Google Store listing does point out that you can connect other 3.5mm-equipped items, such as a selfie stick.