As with most dashcams, the Varia RCT715 is constantly buffering 1080P/30fps footage the entire time it’s on, but when a built-in accelerometer detects a crash, footage from before, after, and during the incident is actually saved onto an included 16GB SD card, and is then accessible through Garmin’s app.
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The RCT715 doesn’t serve as a digital rearview mirror—live video can’t be streamed from it to another device—and for some that may make its $400 price tag hard to swallow. That’s twice the price of the device’s predecessor, the RTL515 radar tail light that doesn’t feature a camera. But should you ever find yourself the victim in a run-in with a car while the driver points the finger at you as the cause, having footage proving otherwise will undoubtedly make you happy you splurged on the upgrade.