Cryo-S Classic device is intended for local, rapid and efficient freezing of tissues using a wide range of contact cryoapplicators and unique spraying cryoapplicator, which with continuous cooling adjustment permits freezing of very small lesions (several cubic millimetres) as well as very large ones (several dozens cubic centimetres) by directly spraying liquid nitrous oxide on treated lesion. Cryo-S Classic can be used both in operating theatres as well as in small surgeries. The device requires no electric power supply. All functions of the apparatus are either supplied pneumatically (from a gas cylinder) or from a battery (timer power supply). The working medium for Cryo-S series devices is nitrous suboxide (N2O) or carbon dioxide (CO2), very efficient and easy to use gases.