Touch free sink faucet has low voltage detection. When the battery is exhausted, the indicator light flashes, and the faucet no longer discharge water, indicate to replace the batter Yes, welcome to cooperation with this. We have big promotion in the market now. For the details please contact with our overseas manager.China Touchless Faucets manufacturers website:http://www.bestbathsuppliers.com/touchless-faucets/