weBoost 470354 Drive Reach RV in-vehicle RV signal booster kit.brbrModular antenna design for optimal positioning on RVs.brbr-Outside antenna fits universal CB mounts (3/8-24 thread).brbr-Spring base protects antenna from wind and low branches.brbr-Works with ALL phones and cellular devices on ALL carriers.brbr-Boosts cell signal in RVs when parked or while in motion.