WiFi 802.11 a,b,g,n,ac,ad,ah,aj,ax,ay Range

Has you seen an wifi so fast and have long range coverage? its according to this table below.
Wifi Coverage at it's best is 802.11n, peak at 250m range outdoor. and amazingly 70m range indoor. WOW!!!

802.11 Protocol	Freq (GHz)	Bandwidth (MHz)	Approx indoor range		Approx outdoor range
			m (meter)	ft (feet)	m (meter)	ft (feet)
-	2.4	20	20 m	66 ft	100 m	330 ft
a	3.7/ 5	20	35 m	115 ft	120 m	396 ft
b	2.4	20	35 m	115 ft	140 m	462 ft
g	2.4	20	38 m	125 ft	140 m	462 ft
n	2.4/5	20 - 40	70 m	230 ft	250 m	825 ft
ac	5	20/40/80/160	35 m	115 ft	240 m	792 ft
ad	60	2,16	60 m	200 ft	100 m	330 ft
ah	0.9		- m	- ft	- m	- ft
aj	45/60		- m	- ft	- m	- ft
ax	2.4/5		- m	- ft	- m	- ft
ay	60	8000	60 m	200 ft	1.000 m	3.300 ft

the latest breaktrough is ac model, which come out at end of 2015, and new device that is released in 2016 sure have ac compatibility, which have many bandwidth coverage. and reach new maximize download speed.

for range comparison graph, you will found out below:

from the left: standard, a ,b, g, n, ac, ad, ah, aj, ax, ay