Stay cool and comfortable with this portable evaporative air cooler featuring a large 20L / 7-gallon water tank and 4 reusable ice crystal boxes for enhanced cooling performance. Designed with mechanical controls for easy operation, this air cooler offers 3 adjustable fan speeds and a powerful airflow reaching up to 7.1 m/s. The 70° wide-angle oscillation distributes cool air evenly throughout bedrooms, living rooms, offices, dorms, and indoor spaces. The convenient top-fill water design allows quick refills without bending down, while the smooth-rolling caster wheels make moving the unit effortless from room to room. Combining fan circulation with evaporative cooling technology, this portable swamp cooler delivers refreshing airflow with lower energy consumption compared to traditional AC units. 1. Powerful Evaporative Cooling Performance This portable air cooler combines fan circulation and evaporative cooling technology to deliver refreshing airflow with a maximum wind speed of 7.1 m/s. Includes 4 reusable ice crystal boxes for enhanced cooling performance compared to most competitors that only offer 2 ice packs. 2. Large 7-Gallon Water Tank Equipped with a 20L (7-gallon) bottom water reservoir for extended runtime and fewer refills. The easy top-fill design allows convenient water refilling without bending over, making daily use more comfortable. 3. 3 Adjustable Fan Speeds & 70° Oscillation Features low, medium, and high wind settings to customize airflow for different environments. Wide 70-degree left-right oscillation distributes cool air evenly across bedrooms, living rooms, offices, and indoor spaces. 4. Quiet Operation & Easy Mobility Designed for low-noise cooling comfort while sleeping, working, or relaxing. Smooth-rolling caster wheels allow effortless portability, making it easy to move the swamp cooler from room to room. 5. Product Dimensions & Specifications Overall dimensions: 17.7" L x 13.2" W x 30.3" H. Rated power: 120W. Motor speed: 1300±100 RPM. Mechanical control operation with adjustable airflow settings and durable portable construction.