2-slot desktop chassis for 500 Series units. Solid steel chassis with inputs and outputs on each side. Power Requirements: 115/230 VAC, 36W. Power Output: +/- 16 VDC 1.6A (0.8A per rail), 48VDC 0.1A. Weight (empty): 6 lbs / 2.72 kg. Dimensions (in inches): 5.3W x 4L x 11D. Note: The mounted units shown in the images are not included in the price.