  The paper is devoted to the description of the iDREAM detector and its
systems. iDREAM is a prototype detector designed to demonstrate the feasibility
of antineutrino detectors for remote reactor monitoring and safeguard purposes.
Antineutrinos are detected with a 1 ton liquid scintillator via inverse beta
decay on protons. In order to suppress cosmic muons, gamma and neutron
background, the detector is housed in a dedicated shielding. The detector is
installed at the Kalinin nuclear power plant (Russia), 20 m from the 3
GW$_{th}$ reactor core.
