| Product Code | ISR4331-V/K9 |
| Aggregate Throughput | 100 Mbps to 300 Mbps |
| Total onboard WAN/LAN ports | 3 (10/100/1000Mbps) |
| RJ-45 ports | 2 |
| SFP ports | 2 |
| Service Module Slots | 1 SM-X slot, 2 NIM slots, 1 ISC slot |
| Memory | 4 GB (default) / 16 GB (maximum) |
| Flash Memory | 4 GB (default) / 16 GB (maximum) |
| Power Supply | Internal AC and PoE options |
| Dimensions | 44.45 x 438.15 x 438.15 mm (H x W x D) |
| Weight | 12.96 Kg |
| Rack Height | 1 RU |
| Wi-Fi Standards | 802.11b, 802.11g |
| Frequency Bands | 2.4GHz, 5.2GHz, 5.8GHz |
| 2.4GHz Transmission Rate | 600Mbps |
| 5GHz Transmission Rate | 1000Mbps |
| Encryption | WPA2-PSK |