WorldaWhirl Whirligig Wind Spinner Display Motor Revolve Twist Turn Twirl Swirl (Battery Powered 30 RPM, 3 Pack) Revolves medium speed, approximately 25-35 rpm depending on the item weight and battery strength For lightweight items up to 6 pounds; use a string or swivel to protect the gears from resistance Spins either way by reversing the battery direction; Requires only (1) D-cell battery (not included) Easy to use on/off switch, flexible hanging top hook, and bottom clip included to secure your item Measures 7.5 inch long overall, 1.75 inch wide, and the round black plastic body is 5 inch long