Are you still consider whether or not to install a fixed and expensive AC in your medium or small rooms? Air Future portable air conditioners will be a good and economical one. It feature 3-in-1 optional functions that is cooling, dehumidification and ventilation to meet your different needs. When you select the Sleep Mode, the fan speed may switch over to low speed for silent operating and cannot not be selected. The temperature will increase 1.8 ℉ （1℃） per hour for the first 2 hours, and then will maintain that temperature for 10 hours. The child lock can effectively prevent children from being injured by accidental touch. It is recommended to activate the Child Lock when the child is out of your sight. This portable air conditioner operates at an acceptable low noise level without disturbing your daily activities. The 24 HR Timer setting will be turned on or off the unit automatically on your schedule. You can select and switch between different modes on the control panel. The unit can also be operated via remote control, so that you don't need to put down what you are doing, saving some of your time. The window kit and its accessories are included in the package. The window kit has an adjustable range of 25.6" - 49", so it can be flexibly installed on vertically moving windows or sliding windows. The air filter is removable and it requires regular cleaning. To improve the working efficiency of the small portable air conditioner, it is recommended to clean it every two weeks.