N970 Pro Dual Modes Aluminum Alloy Rechargeable Wireless Bluetooth Numeric Keyboard with USB HUB 1. Using aluminum alloy and ABS materials, beautiful and generous, good hand feeling 2. Use a wireless keyboard with 28 function keys, including backspace, homepage, end, tabs, etc., to assist with accounting tasks, Excel spreadsheets, etc., to expand your existing keyboard 3. Bluetooth 3.0 technology provides a cable-free, mess-free connection, and a working distance of 10m 4. This scissor switch keyboard provides you with a very comfortable and pleasant typing experience 5. Small size, easy to carry 6. In addition to being used as a numeric keyboard, it can also be used as a hub. Both expansion interfaces are USB3.0, 5Gbps transmission per second, compatible with multiple devices 7. RF: 2402-2482Mhz 8. Compatible system: Android, Windows, Mac 9. Battery capacity: 140mAh 10. Working voltage: 3.3-4.2V 11. Working current: less than 2.5MA 12. Size: 121x100x12.5mm 13. Weight: 95g