PRODUCT INTRODUCTION: This product is Europe's new design, by strict production control and quality inspection. All the product have accordant quality and excellent function. Easy installation, handsome appearance, with good performance. It is a elegant periphery equipment for projector. PRODUCT SPECIALITY: Use four- columniation helix pole and foot-step control. Automatic control, running stably, easy installation, accurate position, low power waste, good stability, and low noise. Excellent wooden appearance.