eosmsg​ is a professional refurbished camera detection software whose results have been recognized by official platforms such as Chinese courts. It can accurately detect core usage data of mainstream camera brands including Canon, Nikon, Sony, and Pentax, covering parameters such as model, serial number, shutter count, mirror count, mechanical shutter count, and CMOS dead pixels. Uniquely, it supports querying the historical maximum values of key parameters like shutter count, mirror actuation