E-Series Elma commercial duty, commercial quality ultrasonic cleaner. 1.75 litre tank. Optimized 37 kHz ultrasonic frequency is ideal for cleaning platinum, gold, and silver jewelry. Integrated heater with separate electronic time and temperature controls. Powerful robust design. Includes E15H Elma professional ultrasonic cleaner, tank cover, basket, SparkleSONIC cleaning solution concentrate, and exclusive two year warranty.