zBoost YX699 Professional Signal Meter for Installers (Black) reads the signal level for best placement of an antenna help the installer identify the signal strength It is designed to operate in both the CELL and PCS bands Detects best location for the antennaReads signal strength Identifies peak antenna alignment - Attach to antenna to read signal strength from directional antenna Easy to usejust plug in (or add batteries) and start reading signals Small footprint and lightweight Dual-band works with most carriers at both Cellular and/or PCS frequencies (excluding Nextel or iDEN)