I don't have my notes in front of me now, but it depends on ground speed. I calibrated it for 35 psi on the gauge. At lower speed, it would do around 35000 square feet per tank and at fast walking speed, it would do just under 1 acre per tank. If I recall correctly, the tank is 16 or 17 gallons. If you need exact numbers, let me know, but you can make it do whatever you want via ground speed and product concentration.
This rig is good for acre lots. That is what I use it on now. The 2 low drift nozzles are fine even in 10 mph winds and put down roughly 5' spray width, if I am not mistaken.