Compact Design - 20% smaller size than the previous model.Side Mount Design - Increased more than 30% of the working space below the sink area.Improved Infrared Sensor - Detects faster and precisely with Point-N-Lock technology.Low Energy Consumption - Increased battery life up to 1 1/2 year (Powered by just 4 AAA batteries).New Battery Compartment Design - Easier to open and close the battery slipcover.Softer Touch Button - Better manual on/off control.