What is the range for my Gateway Pro hub?

For Z-Wave protocol, the range is about 100 feet (30 meters) but is depends upon the materials in the way of the devices.   

• Certain obstructions decrease the Z-Wave range: each wall or obstacle (such as refrigerator, big screen TV, etc) between the Gateway and Z-Wave device reduces the maximum range by approximately 25-30%.   
• Brick, ceramic, tile, granite, concrete walls, metal walls, mirrors, and smoked glass block Z-Wave signals more than wall made of wooden studs, plasterboard (drywall), clear glass or plastic.   
• Wall-mounted Z-Wave devices installed in metal junction boxes suffer a significant loss of range (approximately 20%) since the metal box blocks a large part of Z-Wave signal.