The "E" Series by Elma offers the highest quality on the market. Operates on (2) Cleaning Modes: continuous or timed operation and is adjustable from 1-30 minutes. Elma’s new high performance transducer system will adjust automatically according to the load of parts put into the tank thus allowing for even sonic action. The "E" series also offers top cleaning results with the sweep technology and built in adjustable heat control. Look no further! Will not find another Ultrasonic on the market with comparable quality with as many features at a great economical price. Includes Lid. Made in Germany, 2-Year Warranty, 110V/60Hz.