The Wi-Ex zBoost (zP) is the personal cell phone signal booster.  Designed to increase coverage for the desktop area, the zBoost dual band cell phone signal booster extends a zBoost Cell Zone for a single user at their work area.  (If you need coverage greater than 4-6 ft, please try our zBoost for th ehome YX510 DualBand.)  zBoost zP uses patent pending technology to protect the carrier network.   zBoost zP is Dual Band and compatible with all phones operating on PCS(1900Mhz) and CEL (800 MHz) except Nextel.