"The capacity for shooting 4K differs slightly on each of the two cameras, as the more professionally styled RX10 II can shoot 4K video at extended lengths (up to 29 minutes in the US), while the more casual, pocket-friendly RX100 IV can shoot 4K clips at up to about 5 minutes in length. Additional professional caliber video features on both of the new cameras include Picture Profile, S-Log2/S-Gamut, and more. " http://www.sony.com/en_us/SCA/company-news/press-releases/sony-electronics/2015/sonys-rx100-iv-and-rx10-ii-cameras-bring-professio.html Sony USA 29 minutes for the RX10 II in 4K.