Automatic and Easy to Use No need to touch the faucet to turn on/off when you washing your hands. Touchless technology makes your life more high-tech. Suitable for hotel, restaurant, RV, hospital or other commercial use and home use. Deck Plate is Detachable Suitalbe deck thickness: 0.78in/20mm. Hole size: 0.78in/20mm-1.18in/30mm. Deck plate is detachable. Keeping it for good looking is recommanded. Touchless Sink Faucet Made of premium stainless steel, multi-layer brushed nickel finish, smooth feeling, stunning looking. Feels More Comfortable The high-quality bubbler makes the water flow more comfortable, at the same time effectively reduces the water splash and makes your sink clean and comfortable. Easy to Adjust the Temperature You Like There is a built in mixing valve that is in the white box under the sink . You set the water temperature you like from there. White Box (LR6 1.5V*4) Battery Type: 4pc AA alkaline battery. (Package NOT included.) Notice: When the battery is low, the sensor light of this touchless bathroom faucet will always on. Then you should replace the batteries. Q1:How to change the water temperature? A1:There is a built in mixing valve that is in the white box under the sink . You set the water temp from there. Q2:Does this touchless faucet come with small handle to keep using it if batteries fail? A2:No. But you only need to replace the battery, it will resume to use at once. Q3:How long will the batteries last? Q3:It depends on your battery supplier. (Alkaline batteries have a longer life and batteries are not included in the package.)