The 10C EVO\'s compact, aerodynamic design is optimized for helmets as it hugs close to the outer shell. This results in reduced wind resistance and noise, improving your audio experience. In comparison to other similar camera systems, the design is slender yet the performance excels where it matters, with up to 20 hours of talk time and 1.5 hours of video recording. Capture video in 4K at 30 frames per second or take photos in still shot, burst, or time-lapse mode. The camera button allows for simple one-touch recording while Voice Prompts keep you updated on the camera\'s progress. With video tagging, you can save important events from a continuous loop of video recording, instantly creating highlights. As for storage, the 10C EVO accepts MicroSD cards up to 128 GB. The camera’s integrated communication system mixes audio from the intercom and music from your smartphone into your video, on the fly. Smart Audio Mix™ allows you to narrate your footage while it’s happening through the intercom and capture the authenticity of the moment, while reducing the need for follow-up audio editing. Bluetooth 4.1 Slim Design Ultra HD: 4K 30FPS Intercom 1.6 KM / 1.0 MI Four-Way Intercom Voice Prompts Smart Audio Mix Advanced Noice Control