This has been opened but is in like-new condition (pictured is the actual item.) Shortly after we bought this we moved to a different internet provider and got a different cable modem. Comes in original box with all inserts, CD and instructions.Why pay the monthly internet modem rental fee when you can own your own modem? Listed new for $150.See technical specs below:
Product Features

• DOCSIS 1.1 and 2.0 Certified
• Integrated A-TDMA and S-CDMA technology--capable of providing up to 30 Mbps upstream data rate
• USB and Ethernet connectivity
• Front panel status LEDs and built-in HTML-based diagnostics for quick and easy troubleshooting
• Compatible with Windows 95, 98, 2000, Me, NT, XP, Mac OS, Linux, and UNIX

Technical Details

• Model: SB5100
• Type: External, platform-independent modem with HTML-based user interface for status troubleshooting
• Standards: Integrated DOCSIS 2.0 A-TDMA and S-CDMA technology
• PC interface: USB for Windows 98/2000/XP
• Cable interface: F-Connector, female, 75 ohms
• CPE network interface: USB, Ethernet 10/100BaseT (auto sensing)
• LED indicators: Yes (front panel)
• Users: Supports up to 32 users (1 via USB and up to 31 via Ethernet or 32 users on Ethernet)
• Power: Internal power supply: 9 Watts (nominal)
• Input power: 100-240 VAC, 50-60 Hz
• Excite@Home Level 2 Approved: Yes
• Bridging: Ethernet and USB connections are bridged allowing LAN traffic between USB device and Ethernet LAN
• Networking: 10/100BaseT Ethernet (auto sensing)
• Remote management: Yes (via SNMP)
• Software upgradeable: Yes (over the network)
• Top-mounted stand-by button: Yes (enhances network security to end-user)
• Troubleshooting: HTML-based diagnostic user interface
• Global safety approval and certificates: CB scheme (EN60950/IEC950), CE-Evaluation test report (EN55022/EN55024), FCC Part 15, UL 1950
• Downstream demodulation: 64 or 256 QAM
• Downstream maximum data rate: 38 Mbps
• Downstream bandwidth: 6 MHz
• Downstream symbol rate: 64 QAM 5.069 Msym/s
• Downstream symbol rate: 256 QAM 5.361 Msym/s
• Downstream operating level range: -15 to +15 dBmV
• Downstream input impedance: 75 ohms (nominal)
• Downstream frequency range: 88 to 860 MHz
• Upstream modulation: 8, 16, 32, 64, 128 QAM or QPSK (with A-TDMA or S-CDMA enabled CMTS)
• Upstream maximum data rate: Up to 30 Mbps
• Upstream bandwidth: 200 kHz, 400 kHz, 800 kHz, 1.6 MHz, 3.2 MHz, 6.4 MHz (with A-TDMA or S-CDMA enabled CMTS)
• Upstream symbol rates: 160, 320, 640, 1280, 2560 and 5120 ksym/s (with A-TDMA or S-CDMA enabled CMTS)
• Upstream operating level range: A-TDMA: +8 to+54 dBmV (32QAM, 64QAM), +8 to+55 dBmV (8QAM, 16QAM), +8 to+58 dBmV (QPSK), S-CDMA: +8 to+53 dBmV (all modulations)
• Upstream output impedance: 75 ohms (nominal)
• Upstream frequency range: 5 to 42 MHz (edge to edge)
• Data protocol: TCP/IP
• Operating temperature: 0 degrees to 40 degrees C
• Storage temperature: -30 degrees to 80 degrees C
• Operating humidity: 0 to 95 percent R.H. non-condensing
• System requirements: Windows 95/98/2000/NT/Millennium, Macintosh, UNIX
• Width: 2.3 inches
• Height: 6.2 inches
• Depth: 6 inches