Material: sugar glue size:3.3 *5.0cm Light source:three superflux LEDs Switch: touch by hand& put on water electrical source:two CR2016 batteries (the longevity of battery:It can be persistent blinking 12 hours) Light color: red,bule,green,red to bule,bule to green,red to green,fast changing red green,blue,slowly changing red, green, blue