All New “Light Rail 4 Adjusta Drive” now with fully adjustable variable speed control between 6 and 10 r.p.m. and 0 to 60 second adjustable time delay for promoting even plant growth at the ends of the lamps travel. The all New “Light Rail 4 Adjusta Drive” from Gualala Robotics is sure to give any gardener the ultimate control. Rail and motor kit in one box - box dimensions 41" x 6" x 5". Excellent for shipping or conserving space.