Great Product, Personally Used by MeMr. Christmas CHRISTMAS TREE LIGHT VARIBALBE TWINKLE SPEED CONTROL Model Number 131 Create a spectacular TWINKLE light effect on your Christmas Tree with the easy to use Twinkly variable speed lighting control! Purchased by me in 1981 and used successfully on the Family Christmas Tree until 1999 when we upgraded our special effects Christams Tree lighting. UL LISTED Made in Hong Kong for Mr Christmas New advanced electronic integrated circuitry makes your Christmas Lights "Twinkle" like the stars. VARIABLE TWINKLING SPEED 3 INDEPENDENT CIRCUTIS JUST PLUG IN - NO BATTERIES NEEDED FOR INDOOR USE ONLY LIGHT SETS NOT INCLUDED NO SPECIAL FLASHER BULBS NEEDED TAKES UP TO 10 (35 MINITURE) LIGHT SETS IN EACH OF 3 SOCKETS Downsizing collections in anticpation of a pending move. 100% POSITIVE FEEDBACK E-BAY SELLER! I will consider discounting shipping & handling charges for multiple purchases combined in one shipment to the same address. Smoke Free Home Check out my other items ! Be sure to add me to your favorites list !