The Wilson 301148 Cradle Plus Phone Cradle for Wilson Mobile Wireless or SIGNALBOOST Boosters works with the WSN801232 Wilson Mobile Wireless boosters (sold separately) to boost your signal up to 10 times that of most cell phones. It supports any hands-free device, including earbuds and Bluetooth devices and adjusts to fit any size cellular phone. Install it in minutes on your dashboard or windshield and enjoy a stronger cellular signal in an instant.