The Elmasonic E+ series of ultrasonic cleaners feature simple control with superior cleaning technology. Select heating temperature from 30 to 80?C, in 5? increments, with a rotary dial. Choose a maximum temperature for sensitive items and instruments?LED light illuminates if reached. Heating not available on model 59988-14. Set to operate continuously or in timed runs, from 1 to 30 minutes, also selected with a dial. The integrated sweep mode ensures even sound distribution throughout the bath at 37 kHz for efficient and effective cleaning. Turn on pulse mode to increase ultrasonic power 20%?ideal for those hard to remove soils and pastes. Safety features include auto-shutoff if running for 8 hours continuously or if bath temperature exceeds 90?C, and a sealed display and elevated feet to protect against splashes and spills. Baths with capacities above 1 gallon also feature a side-mounted drain for easy emptying and cleaning. Protect sensitive items?safety shutoff and temperature-selectable alarm light Easily preselect run time and temperature with rotary dials Obtain uniform sound waves and cleaning from the sweep function Activate the pulse function for 20% increase in ultrasonic power and soil removal