Enjoy peaceful sleep with the Contempo Series portable air conditioner. One of the quietest portable air conditioners in its class, the Contempo series noise level falls between 45 to 49 dbA (depending on the BTU and fan speed). What's more? The built-in Sleep Mode is a pre-set 10-hour program that increases the temperature at fixed intervals, so you can save energy when you are least active. Sleep Mode reduces the temperature gradually near the end of the cycle so you can start your day in a cool room again. Unlike a fixed air conditioner unit, the Honeywell portable air conditioner requires no permanent installation and the smooth-gliding caster wheels provide easy mobility from room to room. Built-to-last, the dual filtration system protects and extends the life of your air conditioner, while thermal overload protection on the compressor and motor, means extra safety precautions for added endurance and peace of mind for you.