KELVI is an innovative healthcare universal control unit created to regulate heating and cooling of a human body. Dealing with health problems or controlling health level is never easy, so each potential user needs to feel in a supportive and trusting environment. It’s a real honour to work with a product that helps to improve wellness and, collaborating with KELVI, 415Agency combined simplicity of graphics with multifunctionality. The main aim was to design a comprehensible interface — thus people of all ages and states may feel free to use the device. Instructional animations were created to immerse a user into experience, and we also used soft colors and adjusted common icons so that working with the device causes no feelings but calmness and confidence. The settings, battery and liquid indicators, all interface design elements were brought to perfection, so now we are sure we did our best to make a contribution to a great project of healthcare improvement.