Fascinating rotating led crystal led bulbUnmatched good safe and reliable product from the leaders in led lights from lightahead known for its good branded products. Made of plastic. Easy to install in any light socket or lampMulti-colour lights change automatically. Has a slight whirring sound of motor.ideal for home partys ,disco, bars ,clubs ,stage and even childrens rooms. 3-1w led1.) Make sure the bulb is plugged firmly into the socket 2.) the socket must not be connected with an extension cord for best experience.3.) if the bulb does not rotate please remove and re-insert into the socket to make sure it is firm and place well into the base