SPR-8902A sensor faucets: The non-touched water tap can automatically offer and stop water. It saves time and water and is hygienic . Its controlled by a micro computer. It can automarically set up the best inductive distance according to the colour and shape of the basin. Installers neednt give a lot of care .It can be used as a single-cold type and also can be used as a cold-warm type when adding a thermostat. Using 4PCS of #5size general basicity battaries for 100 times per day, you neednt change any battaries in one and a half years. use voltswater pressure AC220v 50/60Hz mix0.05Mpa　 max1.2Mpa4V #5size general basicity mix0.05Mpa　 max1.2Mpa