| MPN / Part Number | ER‑4 |
| Brand | Ubiquiti Networks (UBNT) |
| Official Product Name | EdgeMAX EdgeRouter 4, 4‑Port Gigabit Router with SFP |
| Product Type | Enterprise Edge Router, Wired, Fanless |
| Architecture | MIPS64, 4‑Core CPU @ 1 GHz |
| Memory | 1 GB DDR3 RAM |
| Storage | 4 GB eMMC, 8 MB SPI NOR |
| Ports | • 3 × 10/100/1000 Mbps RJ45 Ethernet • 1 × 1 Gbps SFP Slot (fiber) • 1 × Console Port (RJ45) |
| Switching / Forwarding | • Throughput: 4 Gbps (128B+ packets) • Forwarding Rate: 3.4 Mpps (64B packets) |
| Routing Protocols | Static, OSPF, RIP, BGP, MPLS, IPv4/IPv6 |
| Security Features | Firewall, NAT, ACLs, VPN (IPsec, L2TP, OpenVPN) |
| QoS | Traffic Shaping, Bandwidth Management, Queue Scheduling |
| VLAN | 802.1Q, up to 4096 VLANs |
| Management | • CLI (SSH/Telnet/Console) • Web GUI • SNMP, NTP, LLDP |
| Power Supply | 110–240 VAC, internal PSU |
| Power Consumption | Typical 13 W, fanless |
| Dimensions (W×D×H) | 229 × 136.5 × 31.1 mm |
| Weight | 0.8 kg |
| Enclosure | Metal, black |
| Mounting | Wall‑mountable; 1U rack‑mountable (with ER‑RMKIT, optional) |
| Operating Temperature | −10 °C to +50 °C |
| Humidity | 10%–90% (non‑condensing) |
| Certifications | CE, FCC, RoHS |
| Warranty | 1 Year Ubiquiti Limited Hardware Warranty |
| Application | SMB/Enterprise Edge Routing, VPN Gateway, Branch Office, SOHO |