I have both the Wahoo Bolt and a Garmin Explore Edge. The downside on the Bolt is the small map that does not show street names. The Garmin map is easy to read and has street names. The Bolt works well with my Varia radar, I can hear the alerts. The alerts on the Garmin are barely audible. I have an older version Varia. I've used the back to start feature a few times on the Garmin, it works well. The Garmin also allows more customization of displays and added apps and widgets if you're interested. The Edge has a USB-C connector and runs on external power. The color screen, if left on, is a battery hog. I can run the Bolt for almost 8 hours without needed external power.