Advantages: 1.Reduce temperature around 5-15 degree, good efficient with 3 sides air inlet. 2.Knob or LCD control panel and remote controller with anion, timer, fan speed (3 speeds available), swing and cooling function. 3.Easy to install, take away, and clean with water for cooling pads and dust filter. 4. Saving more than 80% electricity to compare with air conditioner. 5.AC & DC with a conversion switch; 6.Charging time approx 7-8 hours to protect battery for long lifetime; 7.Overcharge and over discharge protection; 8.Battery duration time: 6 hours(Low speed), 3-5 hours(Middle speed), 3 hours(High speed) 10.120 degree rotary wind direction 11.Motor more than 80% effeciency