HP Engage One Top Mount 2x20 CFD. Display number of lines: 2 lines, Display digits: 20 digits, Digit size: 9 mm. Product colour: Black, Mean time between failures (MTBF): 30000 h, Certification: FCC, CE, VCCI, RCM, KCC, ICE, CSA, EAC. Interface: USB 2.0. Power source type: DC. Width: 157.5 mm, Depth: 34.5 mm, Height: 12.9 mm