normally just range.
you can get them with those addons but it greatly increases the price. easier to just get a small humidity/temp sensor and hotglue it to the side of your range finder.
but at the range your looking at, 800m, its not that big a factor. more important will be wind and mirage effects from high power optics. the biggest factors to longrange rifle shooting is learning to judge wind and mirage.
if your going to rely on a laser range finder the hard part will be finding one that can lase a target reliably at that distance for an affordable price. ive got a leupold laser range finder that starts having issue lasing pigs yotes and such around 400+ usually ill lase trees or other objects so ive got known distance to work with
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith