Cisco Aironet 3500 Series Access Points, the first 802.11n access points, can deliver a self-healing, self-optimizing wireless network with CleanAir technology. This series includes three models: 3500i model with internal antennas for typical office deployments; 3500e model with external antenna connectors and extended operating temperature for challenging environments; and 3500p model for targeted coverage and 3G/4G offload in high-density stadium and arena deployments.