Current protection function, support overload voltage and instantaneous current protection function, safe and convenient to use Working humidity: 10%-90%, voltage: 5V, current: 500mA, temperature: -20C -75C, storage temperature: -40C-85C 3. Support system: Windows 95/98/2000/2003/ME/XP/Vista Or Mac OS 8.1 or above (Windows 95/98 system requires driver installation) 1. Convenient and fast and portable - USB 3.0 hub with 3 ports. The compact design makes it easy to carry anywhere Plug and Play - simple and practical. Plug in peripherals: mouse, keyboard, USB flash drive, hard drive, etc. High-speed data transfer and connection. 2. COMPACT DESIGN - Easily store the power cord in its built-in storage, ideal for travel; minimises the risk of scratching other devices. Save space on your desk, and the convenient and compact design provides an ideal way to quickly access USB devices anywhere. 3. Backward Compatibility - Supports transfer speeds up to 5Gbps (USB 3.0), 480Mbps (USB 2.0). This allows you to transfer HD movies or files in seconds). 4. Powerful USB Splitter - Each port has built-in overcurrent protection to protect connected devices and hubs from power surges.