Purpose: Designed to work with most USB devices such as hard disk, USB headphones, USB microphone, keyboard, mouse and more. Features: Ultra compact and durable multifunctional hub, allows you to increase the number of connectors on a device with a Lightning 8-pin connector. Thanks to 2 USB-A connectors (data transfer) and Lightning 8-pin (for charging), you can connect up to 3 devices at the same time. Interface bandwidth up to 5 Gbps. Weight 17 g. 1.Function: Lightning OTG HUB. Dual USB ports+ lightning charging, plug and play, and support the use of USB devices such as USB disk, mouse, keyboard and sound card directly connected to iPad / iPhone 2.. Shell material: aluminum alloy. 3. Size: 150 * 70 * 22mm weight: 35.2G 4. Product parameters: transmission rate: 10gpbs-40mpbs interface: USB2 0 and usb3 0 no external power supply, reading speed: 60MB / s. Can read 128u disk / TF Card