Without heating. Lab disc is an innovative; very flat; magnetic stirrer. It's modern; toroidal coil technology with no moving parts guarantees a maintenance-free drive. Lab disc can automatically change it's rotational direction every 30secs. and therefore enhances mixing of the medium. High IP protection class (IP 65). Set-up plate and casing made from chemically resistant materials. Slip-proof; safe stand. Lab disc white with white surface; lab disc stream and lab disc pattern with decorative surface.