The Cisco C881 ISR router has a lead-free, fanless chassis and is updated versions of the previous Cisco 881 router.Cisco C881-K9 integrated Services Router is fixed-configuration router, designed for small business, small branch office and enterprise teleworkers. The router provides the enhanced feature of security, including firewall, intrusion prevention, content filtering, and sencryption for VPNs, with no requiring additional licenses.