Use the Rapid Flux electric desk riser on a conventional desk to allow sit and stand height adjustable operation | Easy to use up and down buttons, with cable management | With Quiet Height Adjustment with less than 50DB Motor Noise | Quick Release Keyboard Tray and Quick Installation, with No Tools Required | The Rapid Flux is your quick and easy height adjustable solution to your existing desk | Height Adjustable from 120mm to 500mm high | Available in Two Sizes and Two Colours | Electric Height Adjustable Solution for Your Existing Desk | 25kg Weight Capacity | Riser Speed 22mm per Second | Hidden In Motor Makes for a Clean and Compact Design | Grommet Hole in Worktop for Use with Monitor Arms