welcome to my store , Hope you have a pleasant shopping trip! Attention:1>.The longer the USB cable, the more likely the power supply is to be insufficient. Therefore, if a long USB cable is used (for example, at least 1 MB), an independent power supply is recommended; 2>. The current that can be loaded is limited: each downstream USB port is integrated with 2A fuse, so a single port can carry a maximum of 2A current, but the total maximum load current is about 8A instead of 16A; 3>. The load current of the USB port is different from the output current: the actual output current depends on the requirements of the device. It's not like you plug in a 5A power supply and the device consumes 5A current; 4>.The maximum output current is not the charging current: each USB port can carry a maximum of 2A current (provided that the power of the inserted power supply meets the requirements), but the charging current is not 2A.Specifications:1>.Model: MCS-92 2>.Work voltage: 5V 3>.Work Temperature: -25~85 4>.Work Humidity: 5%~95%RH 5>.Size: 85*45*20mmPackage List:1 X Data Adapter Board It is a DC 5V USB2.0 USB-HUB Splitter 1-IN-7 50MB/S Data Adapter Board. USB2.0 480Mbps speed. No drive required, plug and play. Large capacitance filter, pure power supply, stable and reliable communication. Automatic power switch, small power device keyboard and mouse U disk without external power supply. Intelligent identification. Automatic sleep. Up to seven USB devices can be used simultaneously. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied. It is a DC 5V USB2.0 USB-HUB Splitter 1-IN-7 50MB/S Data Adapter Board. USB2.0 480Mbps speed. No drive required, plug and play. Large capacitance filter, pure power supply, stable and reliable communication. Automatic power switch, small power device keyboard and mouse U disk without external power supply. Intelligent identification. Automatic sleep. Up to seven USB devices can be used simultaneously. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied.