【1】Built-in 9000mAh battery, which can be fully charged in 5 hours and works for about 4-4 hours. 16 hours (depending on the wind speed, 4 speeds are adjustable). Very convenient to charge from anywhere. from computers, laptops, mobile power banks, USB chargers, cell phone adapters. 【2】This fan with high efficiency The waist clip is a combination of fan and fan. Waist clip, fan hand and a hanging neck fan. It can be attached to 'belt or pants. An extra lanyard is included which can be used as a collar fan. 2 sides surround the air inlet so that the shirt does not block the incoming air and you feel cool from the inside. 【3】It's not just a hanging fan; the size. Equipped with LED lighting to light your way in the dark. It is very suitable for outdoor work or hiking. In addition, the large 9000mAh battery can act as a power bank to charge your iOS or Android smartphone for 1 to 1 hour. 3 times. 【4】The fan hangs on it The size is ideal for people who work at home. high or low