Dc/AC power supply: The HNZXIB DC ultra-low temperature refrigerator can be connected to an external automotive power supply (cigarette lighter interface), suitable for the ultra-low temperature range from +25 ° C to -86 ° C, with an external size of 30.7 x 16.1 x 20.3 inches (78 x 41 x 51 cm), weighing about 38LB, easy to carry for one person. It supports 12V to 240V voltage, can be powered by on-board or AC power supply, specially designed for the storage of biological samples, medicine or other items requiring long-term ultra-low temperature storage, suitable for scientific research, medical and other professional fields.(CE/EMC certification) Stirling cooling technology:Stirling cooling technology is an efficient and environmentally friendly refrigeration method based on Stirling cycle principle, which achieves ultra-low temperature cooling through pressure changes of gas at different temperatures, and is widely used in medical (such as preservation of vaccines and samples), scient