The Minicube PCR is a high precison and accuracy NIST calibrated device. The machine undergoes 1 week of endurance tests before delivery. We give 2 years of full warranty and we have a 30 days money back guarentee. The device will not need calibration the first two years and possibly longer. We provide a simple easy to follow way for recalibration of the device based on the phase change of Gallium (a kit we provide).