Here are two Garmin Zumo Pressure Monitors. It is reassuring to look at your Garmin 595 and see the exact pressure of both tires. My bike has OEM monitors but does not show the actual pressure so I added these, what a great addition.

Also have an extra power mount for the Garmin 595 that I will sell for $30, along with a Spot GEN 3 for $30. I just took the spot off the bike and it works perfectly, my wife won't let me leave town without it!

One more thing, a Givi quick-release mount for $35.