... *4.5cm in dia.( Customized size is available ). On/Off Button for easy operation Powered by 3 ... batteries and the batteries can be replaced . Led Colors Available: red, yellow, blue, green, pink ,white ,purple ... -color flashing sequence, and more. Printing your logo on it , it is best promotional gift for your brand ... . - We can print your logo on the led flashing stick , it is best promotional ...