Necklace/Waist Clip Fan: This Personal Mini Clip/Hang fan brings forth a dual clip design, which can be used to attach the fan even with your T-shirt or Trouser firmly. An additional necklace strap is provided to hang the fan around your neck when needed. And the most important advantage is that both of your hands can be kept free for other work when you are using this fan and cooling yourself down Charging + cooling: Large capacity battery, up to about 13.5 hours of battery life; with mobile power function,outdoor travel can be a power bank, type-C 2A input fast charge when your cellphone power off 3 Speed Setting + Energy Saving: Third gear speed design, portable fan speed can be adjusted according to your needs in low, medium and high. The fan can be used with USB chargers, laptops, computers, mobile power and other USB-enabled devices Applicable scenarios:outdoor sport, travel, business trip, office, classroom, etc