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 Combining Sena' leading Bluetooth communications platform with an integrated 4K camera, the 10C EVO allows for easy rider communication and video recording. The 10C EVO's features include: A sleek, compact design A brand-new camera platform, capturing video quality at 4K/30FPS Video tagging Smart Audio Mix Four-way Bluetooth intercom up to 1.6 km (1 mile) Bluetooth connectivity to take calls, listen to music and hear turn-by-turn GPS directions Bluetooth 4.1 Voice Prompts Advance noise control HD Voice Remote Control Compatible