zBoost YX699 Portable Signal Strength Meter: * Reads the signal level of the 800MHz and 1900MHz cellular phone frequencies * Detects best location for an antenna * Reads RF signal strength * Identifies peak antenna alignment * Attaches to antenna to read signal strength from directional antenna * Small footprint and lightweight * Dual-band works with most carriers at both cellular and/or PCs frequencies (excluding Nextel or Iden) * Requires 3 x AA batteries