Induction Soap Dispenser: This auto soap dispenser features a new independent adjustable knob with built-in precise infrared motion detection and PIR sensor technology. The improved sensor extends its life and is more responsive, so you can quickly get a hands-free soap dispenser. Sturdy and durable: Made of advanced 304 stainless steel (middle) and ABS plastic (top and bottom), durable and rust-proof, excellent quality retains its metallic luster for a long time, suitable for any bathroom or kitchen sink counter. 3 adjustable soap levels: Soap dispenser capacity 250ml, 1.5 seconds for the first use, 2 seconds for the second, 2.5 seconds for the third, 3 different settings to adjust the amount of soap you want to dispense. Variable Dispensing Control Soap Volume Control liquid volume from 0.5ml to 3ml by adjusting the +/- switch. No drips or smudges, no soap scum. Compatible with most liquids. DURABLE WATERPROOF BASE: The soap dispenser uses Class 3A waterproof technology to prevent soap or water from corroding the circuit board. The new waterproof base bracket with rubber seal helps prevent the battery case from submerging in water to corrode and render the sensor inoperable. Note: This product does not include batteries, you need to purchase four additional 3AAA batteries