Input Voltage Range: DC9V-55V. Speed Adjustment Range: Fully variable from 0% to 100%. Physical Dimensions: 116mm x 76mm x 30mm (or 4.6 x 3.0 x 1.2 inches). Remote Control Battery: The remote requires a CR2032 Lithium Coin Battery which is not included with your purchase This product does not have a back and is intended to be mounted in a specific way, such as in a box or on a wall.