The Branch Repeater is a 1U appliance that is installed in the Branch Office.
It is used to optimize WAN traffic thourgh compression and caching.
Because it is a Citrix product it can de-dupe and increase the compression on ICA connections (XenApp and XenDesktop). This would be a great way to squeeze more traffic through a small branch office pipe. It does require a NetScaler in the Data Center though.