This product is either discontinued or we cannot get that from suppliers.
Cisco A5506-K9 Asa 5506-x With Firepower Services, 8 x 1 Gigabit Ethernet interface,1 management port, Memory 4GB, Flash 8GB, Maximum 3DES/AES VPN throughput 100 Mbps.
Cisco ASA5506-K9, designed for small or mid-size enterprise or branch offices, is one of the Cisco ASA 5500-X Next-generation series firewalls with Firepower services.