NIUNIU4 Port USB HUB 3 0/2 0 Powered FAST Extender Adapter Splitter Laptop specifications: 1 USB2 0 chip, real high-speed chip 2 (Hi-speed) USB2 0 interface, the theoretical maximum rate can reach 480Mbps, backward compatible with USB 1 1/1 0 Standard specification3Equipped with four groups of USB sockets with hot swap function4 Current protection function, support overload voltage and instantaneous current protection function, safe and convenient to use5 Working indicator6 Working humidity: 10%-90%7 WorkingVoltage: 5V8 Working current: 500mA9 Working temperature: -20C-75C10 Storage temperature: -40C-85C11 Support system: Windows or Mac OS 8 1 and above Shipment Quantity: 1 Piece Package Contents: Only the above package contents, excluding other products. Size: 85*30*15mm (Reminder: The size is measured by hand, please allow 1-2 cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.)