REVL, a San Francisco-based startup, has launched a crowdfunding campaign to produce REVL Arc, a 4K action camera with an integrated motorized gimbal. Arc, currently in prototype form, uses four sensors that track altitude and motion, as well as electronic image stabilization to provide smooth footage that automatically keeps level to the horizon, even when the camera operator isn't. The sensor data is used with a mobile app to auto-edit footage for expedited sharing.

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REVL Arc provides three video recording options: 4K at 30 fps, 1080p at 120/60/30 fps and 720p at 240/120/60 fps. The camera can take still images, as well, at a 12MP resolution with four burst mode options: 30 fps for 1 second, 10 fps for 3 seconds, 5 fps for 6 seconds, and 3 fps for 10 seconds. Live video previews are available in the REVL App and via Apple Watch.

Content is saved to an SD card (up to 128GB), while connectivity is available over Bluetooth 4.0 and 802.11n Wi-Fi. The integrated 1100mAh Li-ion battery offers up to 90 minutes of recording in 4K resolution with Wi-Fi disabled. Arc supports third-party devices, as well, including Bluetooth microphones, heart rate monitors and GPS units.

Backers can reserve a final production unit through Indiegogo for a pledge of $349. The company's website says it plans to start shipping the camera this upcoming December, though the crowdfunding campaign lists an estimated worldwide delivery date of March 2017.