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--- The website sfx.by offers information and services related to special effects for events. It mentions various effects such as CO2 cryoeffect, heavy smoke, fire, confetti, foam, snow, and contact information. The website does not support video playback. The CO2 cryoeffect is described as a way to create a stunning show with CO2 jet, producing thick white smoke that disperses quickly and can be directed upwards or sideways. This effect is suitable for various mass events to add dynamism and energy to the audience. Heavy smoke, or cold smoke, is another effect that creates an atmospheric feeling with a thick cloud rising above the surface, contributing to a mysterious and impressive scene, especially for artistic performances, theater shows, slow dances, and other events. Fire effects include fireballs and fountains that can reach up to 3-4 meters in height, popular at rock concerts