Unique Suction Cup DesignWith suction cup and cable,Easy to hanging on window, ceramic tile, refrigerator, marble, Christmas tree etc. If you want to stick to an ordinary wall, we gave away a few 3M double-sided tapes, because this kind of sucker is not friendly to a grainy wall. You can use double-sided stickers to stick to the suction cup for hanging and decoration. 3 AAA Battery OperatedIt is powered by 3 AAA batteries and has separate switch button, which is more convenient to use without being limited by the power cord or USB plug, convenient to operate whether it comes from indoors or outdoors. Note: 3 AAA batteries are not included. Multi Usage Christmas Decoration3D Christmas String Light perfect for home, bedroom, living room, balcony, balcony window, office room, children's room. Product AttentionsLifetime with kind & reliable customer support. Feel free to contact us for any reason or if you are not satisfied with your Lighting LED Hanging Lights, we will reply you within 24 hours.