Lock Switch: Continuous feature with a lock switch on the head to minimize hand fatigue. Construction: Thickened bottle body and sturdy base enhance durability and stability for long-term use. Air Pressure Mechanism: Operates on a manual air pressure system for efficient and even liquid dispersion. Large Capacity: 5-liter capacity allows for ample coverage, reducing the need for frequent refills. Easy Pressurization: Inflating bar allows for effortless pressurization by moving the bar up and down., Manufacturer: Ounfhtrttk