This mini portable air conditioner can use a battery to be taken outdoor. This portable air cooler can be used also for your pets during summer. You can use portable battery or just charge it via USB. It is very economic as the the electricity that uses is only 2.5 watt. Measurements: 13.1*13.1*17cm Weight: 650 g. It has a water tank of 450ml that can be used for 4-6 hrs. Use battery of bigger than 10,000 mAh.