This lot of 2 Zurn Z6900 sensor faucet controls includes two units, both untested. These controls are designed for use in industrial plumbing and fixtures, specifically faucets. With a brand name like Zurn, you can trust that these controls are of high quality and will meet your needs. We don’t have the knowledge to test the item out. That’s why we listed untested or for part only please see picture sold as picture. If you have any questions, let me know.