T&S Brass Automatic Sensor Faucets limit the amount of daily water usage. Use a T&S electronic faucet & save money on water bills, gas bills, & other energy costs. The four ChekPoint Electronic Sensor Faucets can now be modified with an EC-Hydrogen kit, the newest addition to the T&S Brass ChekPoint™ product line. The hydro-generator generates & stores its own power with the flow of water, thus saving you energy & money. With it being a self-contained power source, you no longer need to rely on a transformer or a battery for power!