zBoost RF signal meter will help the installer identify the signal strength and variation inside the building to aid in the placement of the internal antenna. It is designed to operate in the CELL and PCS bands only. Display is switchable between a 0-99 relative signal strength graph and an exact -99dBm to -10dBm reading. The zBoost PSM kit includes - the meter, SMA male to F male cable, antenna and AC power supply. Can also operate off of 3 AA batteries. Detects best location for antenna - Reads RF signal strength, Identifies peak antenna alignment - Attach to yagi or panel antenna to read signal strength from various directions, Easy to use - just add batteries and start reading signal strength, Small footprint and lightweight, Dual band works with most carriers at both Cellular and/or PCS (excluding Nextel or iDEN), Gives reading of strongest signal within frequency range - Cannot differentiate between carriers or display frequency being received.