 So, AdLens interface is an adjustable focus computer lens. So you can adjust by turning the dials on either temple to whatever working distance you need. So, up close on a cell phone, intermediate like using a tablet or a further away watching TV. The yellow tint actually helps filter out blue light which is a cause of eye strain. Over 70% of Americans can suffer from digital eye strain so these help reduce that strain on the eyes. Headquarters are based in Oxford but our CEO and some of the vice presidents at the company have an affinity for Boston so that was the logical choice for our US base.