Sound:it is melody with standard IC in market,customers can choose the one they liked,such as:To Alice,Merry Christmas and so on;
LED light:this one is with red light,you can also choose blue,yellow,white or other colors,when play the sound,the led light will blink;
Function:press the switch,the sound will play and the light will be blink;
Color:other colors are acceptable for the plastic casing;