<P> The HERO4 Black Edition still has a 12 megapixel (MP) CMOS and a f / 2.8 fixed maximum aperture and focus free . It adds Bluetooth connectivity, Highlight tag, Protune Available for photo and a new processor claimed by GoPro to be twice as fast as that of the HERO3+ Black Edition, doubling the frame rates in most resolutions . The HERO4 Black Edition can record 4K UHD video (3840 × 2160) at a frame rate of 24, 25 and 30 fps . In Superview mode, 4K is only possible at 25 fps . Many other rates and resolutions are available . The HERO4 Black Edition still shoots stills at a maximum of 12 MP with a maximum burst rate of 30 fps . With Wi - Fi disabled at 4K / 30, GoPro claims the HERO4 Black Edition battery life to be 65 minutes, increasing to a maximum of 1h 50' at 720p / 240 . The HERO4 Black battery is in a different form factor than its predecessors . Initial side - by - side comparisons of HERO3+ and HERO4 Black edition video results suggest that the newer model has more detail at long range and similar performance at close range . </P> <P> The HERO4 Silver Edition is basically a HERO3 Black Edition with the addition of a micro speaker, built - in touchscreen display, Protune for photo and highlight tag (the first GoPro with this), a lower clocked Cortex - A9 and missing the Black Edition's integrated analog - to - digital converter which supports a wider variety of professional low - sensitivity external microphones . The video modes supported by the HERO4 Silver Edition are similar to those of the HERO3+ Black, due to the higher processing speed and thermal requirements of encoding 4K video (3840 × 2160), but it supports Wi - Fi, Bluetooth and contains the same Ambarella Inc . A9 system on a chip (SoC) as in the HERO4 Black . </P> <P> The HERO Session, released July 6, 2015, is 50% smaller and 40% lighter compared to other versions of the GoPro HERO4 camera . </P> <P> The HERO4 models maintain the H. 264 video codec of previous versions and MP4 file formats . GoPro claims the mono microphone in both the Black and Silver Editions has twice the dynamic range of that in the HERO3+, and that the HERO4 Black and Silver Editions have improved low - light performance . </P>

When did the gopro hero session come out