Check the listing for details. Ubiquiti Networks Unifi Security Gateway Pro 4 USG-PRO-4. Condition: Used. Listed at 44.99 USD. This is a high-performance security gateway designed for enterprise-level networks. It is a Ubiquiti Networks Unifi Security Gateway Pro 4, also known as USG-PRO-4. This particular model is a firewall that is perfect for protecting your network from cyber attacks. It also works as a VPN device, ensuring secure connections between remote offices and clients. The unit quantity for this product is 1, and it is suitable for use in a wide range of applications. With its robust construction and advanced features, this firewall is an excellent choice for businesses looking for reliable and efficient network security solutions.This is a high-performance security gateway designed for enterprise-level networks. It is a Ubiquiti Networks Unifi Security Gateway Pro 4, also known as USG-PRO-4. This particular model is a firewall that is perfect for protecting your network from cyber attacks. It also works as a VPN device, ensuring secure connections between remote offices and clients. The unit quantity for this product is 1, and it is suitable for use in a wide range of applications. With its robust construction and advanced features, this firewall is an excellent choice for businesses looking for reliable and efficient network security solutions.