9000 mAh Capacity: 2 x 4500 mAh batteries provide permanent wind. The operating time can last up to a maximum of 18 hours. The charging time is approx. 8 hours. The two motors are powerful. The integrated fan creates a concentrated, strong air flow Neck Holder Fan: hands-free! That is mainly. Put the fans on your neck and set a gear for wind force. Very easy and practical 3 Gears: 3 wind speeds can be selected. If you hold the button for 3 seconds, the fan switches off immediately. The indicator light turns blue when operating and red when charging Fuse: The built-in batteries were checked very strictly. Furthermore, our dedign includes short circuit protection. The batteries will not explode if they fall / sway Uses and Gifts: The fans are a good gift for your children or friends. It is suitable for jogging, excursion, fishing, reading, BBQ, parties, etc.