EASY SIT STAND UP TABLE JACK DESK WITH AIR RISER: USA Standing Desk is a portable, modern, sturdy and attractive stand-up desk that lets you convert any desk from sitting down to standing up and vice versa for a more ergonomic and back-healthy work station PROMOTES BEST HEALTHY WORK ENVIRONMENT: Helps relieve back, neck and shoulder strain that comes from long hours of sitting at a desk and keeps your body in motion so you'll feel more energized, more alert and more productive ERGONOMICALLY LARGE WORK SURFACE: Designed to fit on any existing desk surface, this sit-to-stand desk includes a large working surface for your monitor, keyboard, mouse and accessories and allows you to stand up or sit down whenever you feel the need MORE THAN 200 PORTABLE HEIGHT ADJUSTABLE POSITIONS: A lightweight and sturdy desk converter that adjusts from 7" up to 16" with ergonomic pump mechanism that raises and lowers the desk to accommodate tall, medium and smaller heights NO-HASSLE 100% ASSEMBLED OUT OF THE BOX: This easy-to-use desk converter includes a sturdy steel base and arrives fully assembled and ready to use right out of the box