HP 867736-001 - EL4000 cable kit - Includes left cable harness assembly, front panel cable, cable front I/O USB assembly, right cable harness PCIe assembly, RJ-45 cable Retail
HP 804290-001 - Front I/O cable assembly - Supports four USB (2USB2.0 + 2USB3.0) ports, two audio jacks, and power on/off switch Retail
Realtek 802.11N WiFi WLAN LAN Wireless Network USB Adapter Nano Dongle for Laptops and Desktops Sale $20.00 Retail $39.00