Zurn z6913 faucet with hydrogenerator with mixing tee zurn puts the easy into sensor faucet installation with our line of automatic e-z sensor faucets. Unlike other sensor faucet manufacturers that have different model faucets for battery, plug-in, and hardwire installation, zurn has combined the technology of three into one. Our family of e-z faucets utilizes 6 vdc power so the same model faucet can be installed in your choice of supplied power. From standard lavatory to gooseneck design, you have the flexibility to choose either battery (three-year life) or unlimited power supplied by plug-in or hardwire. And, our plug-in and hardwire models come standard with a battery back-up feature.