Abstract: An adjustable height system that provides an automatic manner of height adjustment for a platform. The platform is supported by a frame including a scissor lift assembly which raises and lowers the platform to any desirable height. The height is adjusted by activating a portable drive device which is engaged with an adapter element that couples a gearbox to a threaded drive member that actuates the scissor lift assembly. Using the portable drive device in forward or reverse, the platform is respectively raised and lowered.