The Direct Connect (inline) Amplifier improves RF coverage in areas with no signal or low signal strength. Direct Connection amplifiers require that your cell phone or data card be directly wired to the amplifier, via a phone specific adapter (sold separately), providing maximum signal performance in low-signal areas, particularly rural and remote locations. The unit amplifies 800MHz (Cellular), 1900MHz (PCS) and also contains 1575MHz (GPS) bypass to allow for GPS reception.Works with all Cellular/PCS Service Providers except iDEN (Nextel/Southern LINC/Mike) and 1700MHz AWS (T-Mobile US 3G).Full working order. Original packaging included although it has been opened. Was unused as it was miscellaneously ordered by a business.Includes: Direct Connect Signal Booster AC power supply 6" extension cable Mini Magnet Antenna Installation Guide