A Hazer is a machine that creates a very fine haze which is used to enhance lighting beams. Hazers don't create clouds of thick smoke like smoke machines for special effects. They're favoured by television studios as the haze is almost invisible (for the cameras to see through it) yet it picks out light beams like smoke does. There is a glut of cheap hazers which are actually no more than a small smoke machine with a fan. We don't sell those because we don't think they provide a very good haze effect. Our hazers generate a fine diffused haze which is not a thick cloud of white smoke that you'd get from smoke machines. Instead, a constant mist is generated which picks out beams of light without fogging up your location or leaving residue.