SPR-8905A 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