The Asus WL-ANT-157 5dbi & 7dbi High Gain Dual-band Wireless Antenna is a high gain, high-performance dual band antenna. This antenna can greatly increase the effective wireless operation range of 802.11a/b/g/n wireless devices.
Reviewed by 2 customers
I too tried all 3 positions on my router and aimed the antenna both ways to make sure I wasn't beaming off the back of the antenna. I can't say it made any difference whatsoever. I got better results with stock antennas back on with tin foil curved around the antennas beaming the signal in the direction I wanted. That more than doubled the speed compared to the antenna.
Attached it to my ASUS RT-N66U router and it made absolutely no difference in the signal strength on the lower floor room where I have only one bar. Still one bar! Tried various antenna directions and router locations. Went back to the standard antenna!