You can choose from 24 wonderful colors.  Package includes : x1 Soak Of Gel Polish 12 ml.  It must be cured under UV or LED lamp.  It changes colors to temperature change， please check the photos for reference!  When applied on full nail， it has different color on the matrix and the end as the temperature of your nails is higher when closer to your body.  It also changes colors when washing your hands in cold/warm water or when you enter a room with different temperature.