I purchased this faucet in August of 2021 and the sensor has never functioned correctly, goes through batteries very quickly. Recently the faucet either does not work or starts ramdomly on it own. I have to unplug the power supply to get it to stop, when unplugged it does not function at all. I replaced the batteries with fresh high quality batteries and the faucet still malfunctions. I now have to leave it unplugged because it comes on when we are not home and could potentially run for hours. I am dissapointed that a two year old faucet thet cost a considerable amount of money has already outlived its usefulness.This product is discontinued and parts are not available.