This durable model helps students understand Millikan’s famous experiment that reinforces the idea that electric charge exists as an integral multiple of “e”. Easily mount the unit on a table or adjustable height stand - a spirit level is featured on the unit to help with leveling. Included with this Milikan apparatus is an electronic stopwatch, oil atomizer, needle, “A” shaped base, and support rod. A power supply is required; we recommend our model, WLS1799-17.