National Tree 70 Bulb Dual Boxed Low Voltage LED Lights Starter Set with 9-Function Footswitch and Transformer (LS21-801-70) 70 bulb low voltage Dual Color LED light string, 23 feet long STARTER SET with foot switch and transformer, up to seven ADD-ON strings can be added (sold separately model # LS21-802-70) Lights change from warm white to multicolor with the press of a switch Switch controls 9 light functions: steady warm white; steady multicolor; fading warm white; fading multicolor; fading warm white to multicolor; flashing warm white; flashing multicolor; flashing warm white to multicolor; fast/slow Indoor use only