The CAP CER 1800PF 1.2KV X7R 1210 ceramic capacitor has a capacitance of 1800 picofarads with a tolerance of ±10%. It can withstand a maximum working voltage of 1200 volts, or 1.2 kilovolts. The capacitor is classified as X7R, a type of ceramic material known for its stable properties across various temperatures and frequencies.