If you have any problem with the installation, please e-mail us first and we are on your service 24 hours. We do appreciate and treasure your advice on our product improvement. TWO CONTROL MODES: mechanical handle switch and electronic touch on/off control (batteries powered, no need to plug in). Operation Method: open and adjust the handle for temperature and then control the faucet by touching the faucet body. Please note that 4 pieces of AA batteries (can power the faucet 1 year) are needed but not included in our superior sponge package.Best Family Use and Commercial Kitchen Faucet. Superior than ordinary touch on kitchen faucet in application of Smart Safe Technology and better than touchle kitchen faucet due to avoiding too sensitive detection to turn on water when not needed. Superior stainle steel finish resists tarnish, fingerprints, water spots and corrosion from daily use. Durable brushed finish offers your kitchen a