Product Features: Patented Turbocharged flow: Turbo and Jet 4000mAh TypeC Charging Turbocharged Structure with 5Speeds up to 6100rpm Builtin Noise Reduction Structure up to 40dB AntiSlip Pads on the base of the fan Free LaardProduct Specifications: Brand: JISULIFE Input: 5.0V=2.0A MAX(TYP) Battery Capacity: 4000mAh(714.8Wh/3.7V) Working Power: 6.0W MAX Fan Speed: 4.5m/s MAX Battery Cell: Lion battery Charging Time: 2.5 3.5hours Usage Time: 3 15.5hours (depends on speed) Dimension: 82(L)x43(W)x167(H) mm Weigh 220gIntroducing a new concept of JISULIFE handheld fan that features a futuristic modern design. Championing with a small and minimalist look with an antislip base and a free laard that makes it easy to use and to carry around.GREEN (4000mAh) (6000mAh)WHITE (4000mAh)BROWN (4000mAh)