This roof vent fan comes with remote control and has the functions of air in/out, which can take fresh air in and expel smell out. You can use the remote control to switch on/off the fan anywhere in RV, push-button A means air in, B means air out, C means off. This RV roof vent fan provides a fantastic air circulation for RV, trailer camper and other vehicles, helps to lower indoor temperature & reduce smell from food, smoke, waste, pets, etc. It is a great choice to replace your old cracked roof vent whose size is 14" x 14". The RV roof vent is made of durable plastic material which is UV-resistant and waterproof. The Putty tape helps to seal the frame into your RV roof perfectly and prevent the rainwater in. Easy to install, insert vent in rough opening on top of putty tape, use an awl or nail to locate and line up corner drilled holes with the corner screw holes in vent frame. Package Includes 12V RV roof vent fan *1, Remote *1, putty tape *1 and manual handle *2.