Ebo-Jager took their already superior heater and made it better. Heavy duty 2mm thick shock resistant Pyrex glass construction is twice as thick as most other heaters and far stronger. The tempearture is adjustable from 64°F and 94°F with an easy to adjust thermostat. Precision bistable thermostat with an impressive +/- 0.5° accuracy. Free from radio and TV interference. 6 foot double insulated power cord included. 3 year warranty.