Keys Fitness ST-VDB is a strength trainer unit designed for indoor use only. It requires assembly before use and comes with a 90-day warranty on parts and a lifetime warranty on the frame. It is important to consult a physician before using this unit, especially for individuals over 35 or with pre-existing health conditions. Safety precautions should be followed, including using the unit on a level surface, wearing appropriate clothing and footwear, and not leaving children unsupervised near the unit. The unit should be examined before each use to ensure that all parts are in working order.