This is a pair Spectrum Hitron Technologies Cable Modems, EN2251 DOCSIS 3.1 eMTA with AC Adapters. They are in very good condition with no damage or defects.
The Hitron EN2251 is a DOCSIS 3.1 multi-Gigabit cable modem with integrated telephony support.Key Specifications

• DOCSIS Standard: DOCSIS 3.1 (2x2 multi-carrier OFDM/OFDMA) and backward compatible with DOCSIS 3.0 (32x8 channel bonding). [1, 2]
• Downstream Speeds/Frequency: Up to 6 Gbps over DOCSIS 3.1; extended downstream frequency range up to 1218 MHz. [1]
• Upstream Frequency: Software-switchable 5-85 / 5-204 MHz (or fixed 5-85 MHz depending on the specific EN2251 / EN2251-HSP / EN2251-RES variant). [1, 2, 3]
• Ethernet Ports: 1x 2.5 Gbps (2.5GBASE-T) RJ-45 LAN port. [1, 2]
• Telephony Ports: 2x RJ-11 HD Voice ports with SIP or MGCP support. [1, 2, 3]
• Physical Interfaces: 1x RF F-Type 75-ohm female connector (coaxial). [1, 2]
• Additional Features: Built-in MoCA immunity filter, IPv4 and IPv6 support, and optional external backup battery support. [1, 2]
• Dimensions: 204 mm (H) x 177 mm (W) x 45 mm (D). [1, 2]
• Weight: 650 g (± 10g). [1, 2]
• Power: Input power 12VDC, 2A