The item is a ceramic capacitor with part number 2220Y1K00391JXR. It has a capacitance of 390 pF, a tolerance of ±5%, and can withstand a maximum voltage of 1000V (1kV). The capacitor meets the X7R rating, which indicates its temperature coefficient is stable over a wide range of temperatures. Its dimensions are in accordance with the 5750 metric standard for capacitors in the 2220 package size.