Rainbow pom poms along a light chain with white LED bulbs. Power with USB plug or a battery timer box, interchangeable. 3m long with 30 traditionally made yarn pom poms which are 4cm in diameter. There are two sets of rainbow colours which make the light chain look just a good when turned off. The interchangeable power source is really useful, the lights can be used in the mains (plug into a USB socket/ adaptor) or when not near a mains source.