The Chicago 116.585.00.1 Commander Handheld Programming unit let you program, maintain, and monitor the Hytronic and E-Tronic electronic faucets all from the palm of your hand. Ruggedized housing, infrared communications, and touch screen technology give you durable, hassle-free operation. Make all your adjustments without ever having to touch the faucet with your tools. Easy to read and step-by-step instructions help to diagnose your problem, whatever the situation. Use with the optional Commander desktop PC software for easy record keeping. The new Commander from Chicago Faucet.