1 x M.2 Socket 1 with E key, type 2230 for Wi-Fi/BT devices support or PCIE/USB mode,1 x MONO out header *2,2 x USB 3.1 Gen 1(up to 5Gbps) connector(s) support(s) additional 4 USB 3.1 Gen 1 port(s),1 x M.2 Socket 3 with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x 4 mode),2 x COM port(s) connector(s),2 x Chassis Fan connector(s) (2 x 4-pin),1 x LPC Debug header,1 x LPT header,1 x Chassis Intrusion connector(s),1 x USB 2.0 connector(s) support(s) additional 2 USB 2.0 port(s),6 x SATA 6Gb/s connector(s),1 x Internal speaker connector(s),1 x M.2 Socket 3 with M Key, type 2242/2260/2280 storage devices support (PCIE mode only),1 x 8-pin ATX 12V Power connector(s),1 x System panel(s),1 x CPU Fan connector(s) (1 x 4-pin),1 x 24-pin EATX Power connector(s),1 x Front panel audio connector(s) (AAFP)