Lenovo COM Expansion Card. Host interface: BTB, Output interface: RS-232, Host interface gender: Male. Product colour: Green, Purpose: PC, Certification: FCC,CE,CB. Windows operating systems supported: Windows 11. Width: 39.5 mm, Depth: 36.2 mm, Height: 1.6 mm. Package width: 132 mm, Package depth: 136 mm, Package height: 36 mm