New easy-to-read digital display indicates temperature settings, adjustable in 5°increments, from 5° up to 540°C (41° to 1004°F), depending on model. Hot surface alert safety systems protect from accidental burns. Bright red warning lights signal when heating surface is above 50°C (122°F). Unit display flashes “HOT” - “OFF” when heating is turned off, until heating surface is below a cool 50°C. Cimarec’s seamless reflective white ceramic top enhances sample visibility and provides an easy-to-clean and alkali/acid resistance surface. Integral ring-stand holder accommodates 0.5" (1.3 cm) diameter support rod. 110V