A new concept in motor developed by Dancing Helix LLC. The motor gives an impulse of energy so it is on for less then a second and then off for over a minute. No gears. Quiet. 3 AA batteries (not included) will last up to 4 months with continuous use. Small, 4" round 2 1/4 inch deep. Ideal for creating a calming pattern for your Dancing Helix (especially the 36" Dancing Helix) or for any mobile or object you want to twirl. Made in China. Patents Pending.