Features:<br /><br />Size: 3CM diameter・ 2.6CM high<br /><br />Battery: CR2032 batteries(include)・ last more than 8hours. and replaceable<br /><br />Waterproof Design・ No matter you use it as a paper lantern light・ or a under vase light... they are suitable for both.<br /><br />Easy to use・ just need to twist the light・ it will active at one. Steady on Function.<br /><br />Come with a hanging hook on the bottom ・ when you want to put it on the paper lanterns・ so Easy ・ No need other component.