Quatech QSU2-540IS. Host interface: USB, Output interface: Serial, Serial interface type: RS-232/422/485. Width: 110 mm, Depth: 180 mm, Height: 25 mm. Certification: CE / FCC, RoHS. Operating temperature range (T-T): 0 - 70 °C, Storage temperature range (T-T): -40 - 85 °C, Operating relative humidity range: 5 - 95 %. Colour of product: Black