String of (35) Flashing White Led Lights on a 6' Long String Operates on (3) "AA" Batteries Extremely Itsy LEDs On A String You get 35 (which is almost (3) dozen, after all) little bitsy beads of white light on a 6-foot long, 2-strand copper wire. As small as incandescent grain-of-wheat lights, these LEDs are powered by (3) "AA" batteries in a 3-1/2" x 2" x 3/4" thick plastic battery pack. A single push-button switch controls off/slow blink/fast blink/steady on, to meet your most festive needs. After you buy the batteries.