The SmoothTalker Mobile X 30dB gain booster is designed for single user with a phone holder. It improves cell phone signal in remote locations, reduces dropped calls and increases data speed. This plug and play kit has everything you need for quick and easy installation. The universal charging cradle fits both small and large smartphones and charges the phone. Comes with an 11"" Magnetic mount antenna, which is best suited to vehicles with obstructions on the roof where some vertical height is required.