This Curtain String Light features a dual color option and can be set on both cool white or warm white glow. Each curtain light set features clear wire with 210 dual color LED lights on 10 hanging strings, 21 lights per string, 7 ft. long and approximately 5 ft. wide. Each set is supplied with a plug in 12V DC adapter. Curtain light sets can be mounted in rows and can be mounted one above another for higher walls. A maximum of two sets of Curtain Lights can be connected together using one 12V DC adapter. If battery operation is needed, item #BPP-3201 Battery Pack can be purchased separately and can be used to power a maximum of one set only.