Features: -With three speed levels, choose from low, medium, or high airflow depending on your preference and comfort level. -Equipped with a powerful built-in 2000mAh battery, it provides 12 hours of continuous cooling. -With the help of evaporative air cooling cartridge, it can instantly turn hot air into cool, refreshing air, reducing indoor temperature. -With low 20dB noise operation, you can enjoy a quiet, undisturbed environment so that you can focus on work, study and rest. -Compact design, can be placed in bedroom, office, bathroom, living room and other places. Specification: Colour: gray Battery capacity: 2000mAh Size: 31.2*8.5*8.4cm Voltage: 5V Power: 10W .