The small fan comes with 3 built-in 18650 power batteries, each with a capacity of 2500mAh With excellent endurances, it can usage for approximately 8-15 minutes on the highest setting This powerful blower efficiently manages heat outstanding without compromising or comfort With its size and portability, this pocket blower is practical for travel use Simply press and hold to start, and release the button to stop This fan strong with exceeding 45m / s It is equipped with a 28.8mm diameter, low-voltage high-speed motor Built with 13 large-sized precisions machined using technology, this violent fan operates quiet while providing airflows, Manufacturer: Kaeltsyn