For Prime Day Amazon is offering a whopping 43% discount on the Forerunner 255, bringing its price down to just $199 from its regular price of $349. This is the company’s best-selling product, and it has a 4.7 out of 5 rating and it can be purchased as a limited time offer that does not require a Prime membership.

Amazon’s summer Prime Day — which is now a four-day event rather than the usual two days — is well underway, and we’ve been working hard to surface the best deals for our readers.

We like this telescope so much that we rated this as the best smart telescope out there.