When I was using ZBoost this antenna pointed to the nearest cell tower to provide a strong local signal.
These antenna are for use with ZBoost cell boosters
See http://www.zboost.com/how-it-works
1. Wi-Ex 1850-1990MHz, 14dbi YX023PCS
2. Wi-Ex 824-896MHz, 9dBi YX021CEL
http://www.zboost.com/PDF/YX023-PCS-ProductSheet.pdf
http://www.zboost.com/PDF/YX021-CEL-Product-Sheet.pdf
Price is for the two antenna. ZBoost device NOT included