Designed for consumers, the Wi-Ex cell phone signal booster, zForce, extends an in-vehicle Cell Zone. The dual band unit captures the signal outside of your car and amplifies it on the inside for a stronger "hands-free" signal. The unit incorporates a cradle and works with both 1900MHz and 800 MHz phones - most carriers and phones (except Nextel/iDEN or 4G). Easy installation - Package includes everything you need: The product consists of a bi-directional amplifier unit housed in a sturdy, lightweight cradle. The amplifier connects to the vehicle"s 12V power through a supplied Cigarette Lighter Adapter (CLA). Setup overview: The package includes everything you need: zBoost Cradle Signal Amplifier, External Magnetic Mount Antenna and Power Adapter. Just place the magnetic-mount antenna on the roof of your vehicle, connect to your z-Force cradle amplifier, connect the power adapter and place your phone in the cradle. First, position zForce Cradle and plug in the zForce’s power adapter. Second, place the mag-mount antenna, which captures signal from the tower, on the exterior of your vehicle. Third, thread the 10 foot cable from the outside antenna into the vehicle and connect the cable to the zForce Cradle. The LED on your zForce Cradle should light green, indicating that it is operating properly. Fourth, place phone in the zForce Amplifier Phone Cradle and connect with your wired hands-free device or Bluetooth headset. Remember, your mobile device must be in the Cradle to receive increased signal.