Mighty Mule Wireless Gate Entry Intercom/Keypad System (FM136) Allows the homeowner to speak and screen visitors from the safety of their home. The Wireless Gate Entry Intercom System reaches a distance of up to 500-Feet from gate opener's control box and provides crystal clear communication. The stand-alone keypad accepts up to 25 entry codes and is very easy to program. Additionally, temporary codes can be programmed to expire within one to seven days. Gate Entry System includes an indoor base station with a speaker and Intercom/Keypad. Mighty Mule Keypad Mounting Post (FM100) is recommended with the wireless intercom/keypad. Backed by a 12 month Mighty Mule Warranty and Technical Support.