This is a high-capacity aluminum-polymer capacitor, specifically the CAP ALUM POLY 680UF 20 6.3V T/H model. It has a capacitance value of 680 microfarads and an operating voltage of 6.3 volts. The capacitor features a radial design with a can type housing and a resistance rating of 7 milliohms. Additionally, it boasts a long lifespan of up to 2000 hours at an elevated temperature of 105 degrees Celsius.