Reference, Quantity, Value, Footprint, Datasheet, Manufacturer, Ordering #, Distributor, Distributor # H1 H2 H3 H4 ,4,"MountingHole","MountingHole:MountingHole_3.2mm_M3_DIN965_Pad","~","Not a placable part","","","" J1 ,1,"Interconnect","Connector_PinSocket_2.54mm:PinSocket_1x10_P2.54mm_Vertical","~","QPL","2.54mm pitch 1x10 pole male","","" J2 ,1,"USB_B","Connector_USB:USB_B_OST_USB-B1HSxx_Horizontal"," ~","QPL","USB-B pcb mount","","" J3 ,1,"CON1x4","Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical","~","QPL","2.54mm pitch 1x4 pole male","","" J4 J5 ,2,"CON1x2","Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical","~","QPL","2.54mm pitch 1x2 pole male","","" JP1 JP2 ,2,"CON1x3","Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical","~","QPL","2.54mm pitch 1x3 pole male + jumper","","" U1 ,1,"sound_card","mtk_processor:usb_sound_card","","Manhattan","Manhattan Hi-Speed USB 3-D Audio Adapter Model 150859","Conrad","1284595 - 62" U2 ,1,"serial_adapter","mtk_processor:usb_serial","","QPL","CH304 based USB to serial adapter","","" U3 ,1,"usb_hub","mtk_processor:usb_hub_digitus","","Digitus","Digitus DA-70216 USB 2.0-hub","Conrad","1027260 - 62"