ANTENNA EXTENSION: Use to extend 1 antenna up to 10ft/3m from its wireless HDMI extender (wireless HDMI extender not included) MAGNETIC BASE: Attaches quickly to metal surfaces (RV exteriors, metal cabinets) either temporarily or long term MORE INSTALLATION OPTIONS: Install your extender where you want (even in poor reception locations) while reaching a better location with this extender and the extender's antenna HIGH QUALITY: As with all J-Tech Digital products, this magnetic antenna base and extension cord is well made and built to last, compatible with model JTECH-WEX-22DR;JTECH-WEX-22D;JTECH-WEX200;JTECH-WEX-200MD-R;JTECH-WEX-200MD