Edimax BR-6624 2 WAN + 4LAN Load Balancing Router

Smart Load Balancing: three load balancing types allow administrators to manage the load balancing methods best suited to the LAN environment and to maximize bandwidth across different connections.
High availability with double bandwidthFor small-to-medium size business, Load Balancing is the ideal product. With Load Balancer, up to 253 users are connected to the Internet with Double Broadband Speed.QoS (Quality of Service) Load Balancing supports QoS for controlling traffic priority. With QoS, businesses can make the critical traffic or application at high priority and route first.
WAN port Health Check to against connection fail: Load Balancing offers automatic outbound traffic backup to against the failure of either broadband connection to protect your business.