Portable evaporative air cooler Activejet Regular MKR-550B

The Activejet Regular MKR-550B is a compact portable evaporative air cooler designed for localized cooling on desks, shelves and small indoor areas. The unit uses water evaporation to reduce perceived temperature and has a 0.55 L transparent water tank with integrated LED illumination in six colours. With physical dimensions of 165 × 170 × 165 mm and a weight of 0.9 kg, the cooler is lightweight and easy to place in workspaces, bedrooms or living areas. It supports DC/USB power and AC input (100–240 V) and draws a maximum of 5 W, providing quiet, energy-efficient operation and three adjustable airflow speeds with a delivered airflow of 60 m³/h.

Advantages

The Activejet Regular MKR-550B combines small footprint and low power consumption to deliver targeted cooling without the need for refrigerants. Its transparent water tank and six-colour LED backlight offer a modern aesthetic that doubles as ambient lighting. The cooler features simple three-button controls with clear LED status indicators, three fan speeds for customised airflow and multiple power options (USB/DC or AC) for flexible placement. Its grey-and-white colour scheme and compact design make it suitable for both home and office interiors.

Suitable for

Key specifications

How to use

Fill the transparent water tank with clean water up to the recommended level, connect the unit to a power source using the supplied USB cable or an appropriate AC adapter, and switch the cooler on using the front control buttons. Select one of the three fan speed settings to adjust airflow intensity; LED indicators will show the current operating mode. Replace or refill the water tank as needed for continuous evaporative cooling and switch off the device before moving or refilling.

Recommendations

For best performance, position the cooler on a stable, level surface with unobstructed airflow and use in moderately ventilated rooms. Use clean water and empty the tank if the cooler will be unused for extended periods. Do not add oils or other additives to the water tank. When using AC power, ensure the adapter and USB cable are rated for the voltage in your region.