The CAP CER 820PF 25V X7R 0805 is a 820 picofarad ceramic capacitor with a tolerance of ±10 and a voltage rating of 25 volts. It has the metric code of 0805, also known as 2012 in imperial measurements, indicating its dimensions are 0.8 mm x 0.5 mm. The X7R designation signifies that this capacitor is part of the X7R dielectric family, which offers a wide range of capacitance values and has good high-frequency characteristics.