... 1.Customized Logos and Colors 2.Washable 3.Low Power Consumption 4.Green Product,No ... ,pink ,green ,red,ect)3.Size: one-size-fits-all4.Pewer by: button cell battery2,Feature:1.Sound sensitive ... ,2. Built-in yet detachable power source.3. Logo design can be for customize design.4 ... enviroment. no ultraviolet radiation is generated.3,Using:1.Insert button cell battery.2.Slide switch to operate power3 ...