ALWAYS WITH YOU: The mobile design and built-in battery will allow you to have this fan always with you! This is an irreplaceable gadget in the summer - it can accompany you in commuting, at work, at home, by bike, as well as during holidays! LONG WORKING TIME: The powerful 1200 mAh battery allows 4 hours of fan operation. The device's battery is charged with a Micro USB connector, thanks to which the fan can be charged with the same cable and charger that is used to charge smartphones. TECHNICAL SPECIFICATIONS: Battery: 1200 mAh, 3.7V lithium ion. Charger: 5V / 1A (not included). Working time: up to 4 hours (fan). LED status indicator.