Acer 27.T1BM2.001 is a black AC power cord for connecting compatible equipment to mains power. Acer lists this part as the 1800 mm Europe power cord in the VG271UP monitor service guide.
The cord measures 1.8 m and has a plug at one end and an IEC C13 power socket at the other. This layout connects a mains outlet to equipment with a matching C13 inlet, including monitors as identified by the product listing.
It is a practical replacement cord for a compatible setup, with a length that allows some flexibility in positioning equipment relative to the outlet.