The HODU-1 Homeopathic Duplicator™ has a timer function and an "always on" switch. Dial knob with Potency ranges is standard. A button for clearing the box itself. At the rear of the box, there are inputs and outputs for accessory plates and antennas. There is also a signal input and output for expansion with our other products, to improve functionality, create custom treatments, and to save you money.