OFM ESS-3070 is an ergonomic chair designed to provide comfort and support during prolonged sitting. It features adjustable seat height, tilt tension, and reclining capabilities, allowing you to customize the chair to your specific needs. The seat height can be raised or lowered using the lever located under the seat, while the tilt tension can be adjusted using the knob on the side of the chair. To recline the chair, simply pull the lever outwards. To lock the chair in the upright position, push the lever inwards.