· The height can be adjusted freely from 32" to 56".· Durable thick metals and unique 3-layer anti-rust coating technology.· Tray tilts 180 degrees for maximum flexibility.· Come with clamp-on rack tray holder to put accessories such as smartphone, pencil etc.Quick assembly and easy storage with a carrying bag, suitable for travel, school, bands and home.· If you have any problems with the product, we provide customer service response within 24 hours.