Cisco 1921 Integrated Services Router (CISCO 1921/K9 IP Base):

Embedded hardware-based cryptography acceleration (IPsec + SSL): Yes
RJ-45 onboard LAN/WAN 10/100/1000 ports: 2
EHWIC slots :2
Doublewide EHWIC slots (use of a doublewide EHWIC slot will consume 2 EHWIC slots) :1
Cisco Integrated Services Module (ISM) slots: 0
Memory (DDR2 DRAM): Default/maximum 512 MB/512 MB
USB flash memory (internal): Default/maximum 256 MB/256 MB
External USB flash-memory slots (Type A): 1
USB console port (mini-Type B) (up to 115.2 kbps) :1
Serial console port (up to 115.2 kbps): 1
Serial auxiliary port (up to 115.2 kbps): 1
Integrated power supply: AC and DC power-supply models

Power-supply options; POE (external) - on AC models only
Redundant-power-supply support: No