HPE FlexFabric 5710 48SFP+ 6QSFP+ or 2QSFP28 Switch At least one power supply is required for operation (not included); two free slots. 4 x free slots for fans (front/back or back/front; not included); four fans required for operation. Includes: 2 x Rack mount bracket 2 x long rail with 4 x M4 screw 1 x PSU bay cover Please note: Mixing different types of power supplies is not possible.