Descriptions:
Functions: 4 No and 8 Yes
NO complicated setting
NO need to connect to PC (computer)
NO lag.
NO void console or controller warranty. Plug and Play, user friendly.

Yes- Cross consoles platform controller usage.
Yes- wired PS4 Controller (connect with charger cable) rapid fire function enabled on PS4 consoles.
Yes- wired Xbox One Controller (connect with charger cable) enabled on PS4 consoles plus rapid fire function built in.
Yes- wired PS3 Controller enabled on PS4 consoles plus rapid fire function built in.
Yes- wired Xbox 360 Controller enabled on PS4 consoles plus rapid fire function built in.
Yes- wireless Xbox 360 Controller(connect with 360 Gaming receiver) enabled on PS4 consoles plus rapid fire function built in.
Yes- independent rapid fire function enabled on each buttons.
Yes- firmware can be updated.

Cross Fire 3.0:
Size: approximately 12.3 x 8.1 x 1.9cm
Weight: approximately 113g
Cable Length: approximately 60cm