Sealey Dellonda Single Motor Ultra Quiet Adjustable Height Desk DH17Height adjustable desk frame creates the possibility of a sitting or standing working environment. Single motor system ensures a fast and stable adjustment. Features ultra quiet operation with sound level less than 50dB. Range of four desktop designs available; Model No's. DH19, DH20, DH21, DH22. Some simple assembly is required. WORK IN THE WAY THAT SUITS YOU Height adjustable desk frame creates the possibility of a sitting or standing working