TWINKLY App Controlled 105 Count 34.67 ft Multi Function Color Changing LED Plug In Christmas String Lights Kitchen Island Lighting which include patented Retention Force 1000088971 which include patented Retention Force Technology to promote consistent performance over the life of the system Q: Can this battery be used in cold conditions Control the lights remotely with your phone through the Twinkly app Draw and customize the different effects you want on your lights Links up to 2 sets to extend your lights for extravagant effect For indoor outdoor use Series Name App Controlled Power Source Electrical outlet Bulb Type LED Bulb Style Dome Light Projector No Bulb Diameter (Millimeters) 5