Greenspring Commercial Deck Mount Solid Brass Auto Sensor Bathroom Sink Faucet with Automatic Sensor Chrome Bath Tub Faucet Unique Designer Vanity Tub Faucets Function:Bathroom Sink Faucets auto faucet sensor circuit Easy to install; Instructions, hardware & US-standard fittings included Smooth, long lasting, drip-free operation ceramic disc cartridge.Pls note this product just use battery , not electric Deck Mounted Single Handle Hot & Cold Mixer Control Smart Touchless Sink Auto Sensor Faucet LIFETIME BREAKAGE WARRANTY&30 DAYS FREE EXCHANGE GUARANTEE: In case any broken problem happens, contact Greenspring service to help you solve the problem until satisfaction. 100% Brass Made Do not Fade not Rust Mirror Plating Process Surface Polished Chrome Finished Corrosion Resistance Heat Resistance ABS material 304 Stainless Steel Filter Honeycomb Water Out Design Soft Water Non-splash Saving More Than 30% Water Easy to Blister Easy to Clean Battery Type: AA X 4 Battery Included: No