A revolutionary cell phone signal booster for demanding professional coverage applications, the zBoost designed YX645, for custom installers, is a Bi-Directional Amplifier (BDA) System which captures and amplifies the cell signal to extend a Cell Zone™ up to 12,000 square feet. The YX645 is designed for the professional installer and is available for the 800 MHz Cellular, the 1900 MHz PCS band or Dual Band (both 800 MHz and 1900 MHz bands).