COMPANION COMP10212 is a portable evaporative air cooler that can be powered by a rechargeable battery or by an AC/DC adaptor. It has two fan speeds and a cooler function that can run simultaneously. The unit has a 1200ml water tank capacity and a water consumption of 150ml/hr. It can run for approximately 3.3 hours on high speed with the cooler running, or for 6 hours on low speed with the cooler running. On battery power alone, the fan can run for approximately 3.6 hours on high speed or 6.5 hours on low speed. The unit has an airflow of 250 m3/hr.