This is a 15 pF ±10% 100V ceramic capacitor with the designation of CAP CER 15PF 100V C0G/NP0 1210. It has a capacitance value of 15 picofarads and operates at a voltage rating of 100 volts. The C0G/NP0 classification indicates it is a high-stability ceramic capacitor, suitable for use in various applications including electronic circuits.