LampLust 31 Ft. STRINGS ONLY Warm White 100 LED Indoor Outdoor Cool Touch Connectable Holiday String Light Expansion Strand Expandable to 1200 LEDs (Power Source Not Included - No Battery Pack) Strings only (POWER SOURCE NOT INCLUDED - NO BATTERY PACK) Suitable for indoor or outdoor use (not submersible) This item does not come with a power source. Must be purchased separately Cool to the touch when lit. LEDs will not get hot and last over 10,000 hours One 100 LED Warm White string light green expansion strand compatible with LampLust Battery Operated 100 LED Starter Kit (ASIN B00FQMYP44) and LampLust Battery Operated 200 LED Starter Kit (ASIN B00D46ZXA4)