"The Sprite’s aluminum housing is designed to be part of the heat management system. The internal microprocessor has a solid copper heatsink that transfers heat to the outside air through the housing. While it is normal for the Sprite to feel warm, if the ambient temperature is well over 100F (40C), extra heat management may be desired. Simply placing the Sprite flat on a metal surface can reduce the temperature. A clean, unpainted aluminum plate, at least 12 x 12 inches (30 x 30 CM) works well." ---Quote from "DV-S1 Sprite Manual revision 4.00 for firmware version 20210416" (Source: medeawiz.com/Downloads.html)