During recent summer heatwaves, the demand for mobile air conditioners has surged, and the Dreo AC318S has faced shortages. The device has now returned to stock on Amazon during the Prime Flash Days, offering an opportunity for consumers to purchase it in advance for the upcoming heatwave. The Dreo AC318S is a portable air conditioner with a cooling capacity of 7,500 BTU, or 2.2 kW, suitable for a room or office up to about 15 square meters. It was first introduced in France during the spring when Dreo launched its range of fans and air conditioners. During the Prime Flash Days, the Dreo AC318S is available on Amazon for 449.90 euros, compared to a reference price of 599.99 euros. It features a design that expels condensation water through a hose in cooling mode, eliminating the need for a reservoir. This makes it particularly suitable for renters and individuals who cannot install fixed air conditioners. The device includes a window kit, which allows for installation without any drilling. The Dreo AC318S offers three functions: cooling, ventilation, and dehumidification, with the ability to cool between 16 and 30 degrees Celsius, ventilate on its own, and dehumidify up to 2.5 liters per hour. It is compatible with remote control via the Dreo app, as well as with Alexa and Google Home. A timer function allows users to adjust the device's operation up to 24 hours in advance. According to a test published in July by the German website HouseControllers, the Dreo AC318S was able to reduce the temperature in a 15 square meter room from 30 to 25 degrees Celsius in about twenty minutes. The device is compact and mounted on wheels, allowing it to be moved between rooms as needed. However, the test also noted that the compressor noise level was approximately 53 dB in night mode, which could be a concern for light sleepers. The Dreo AC318S is not intended for use in large spaces, as it is designed for a maximum of 15 square meters. For larger areas, alternatives such as the Dreo AC515S with a 10,000 BTU capacity, which covers up to 35 square meters, are available. In a comparison of portable air conditioners, the Comfee Breezy Cool 2.6 is noted for its value for money, while the Midea PortaSplit is noted for its performance. The Dreo AC318S is suitable for a single small room where the absence of drainage and app compatibility are more important than power. It uses refrigerant gas R290 and has an energy class A rating. The device is compact and easy to move due to its wheels. However, for intensive dehumidification, drainage is necessary. The current price of 449.90 euros is lower than the reference price of 599.99 euros, but it is noted that the price has fluctuated since its initial launch in France, where it was announced at 460 euros and had already dropped below 400 euros by the end of June. The interest in the current offer lies in its availability, as portable air conditioners have been scarce during heat episodes. Before purchasing, users are advised to measure their room and ensure that their window can accommodate the 15 cm diameter hose. If there is no urgency, waiting for a more significant price drop before summer could be an option. For those planning to use the device for an extended period, a more powerful model may be preferable. To take advantage of the Prime Flash Days, users must first subscribe to an Amazon Prime membership, which can be done with a free 30-day trial.