User manual:
1.Inductive light.
2.Light is on when the cup is filled with liquid(water, drink, alcohol etc).
3.Fliching thythm is changable automaticly.
4.Light is off when no liquid's filled in.
5.Cleaning with water.
Battery-changing instruction:
1.Two batteries are at the bottom.
2.Open the lid with screwdriver, put two batteries in, close the lid.