This is a small ceramic capacitor with a capacitance of 0.8 picoFarads and a tolerance of ±0.1 picoFarads. It has a working voltage rating of 16 volts and is designed for use in applications where high stability is required, such as in timing circuits or filter networks. The C0G/NP0 designation indicates that it is a type of ceramic capacitor with low temperature coefficient and high stability over a wide range of temperatures.