The BSF8 Timing Control comes as either a "display top" (DT) unit or a "display bottom" (DB) unit. This distinction refers to the location of the LCD readout on the control - either on the top or the bottom of the unit. In general, if a control is to have a control code sticker on its top surface, the "display bottom" unit is recommended.
The DB unit is available in blue or red. The DT unit is available in blue only.