(Upgraded) Rii 2.4GHz Mini Wireless Keyboard with Touchpad＆QWERTY Keyboard, Backlit Portable Keyboard Wireless with Remote Control for Laptop/PC/Notebooks/Windows/Mac/TV/Xbox/PS3.(i8+ Blue);

Specification: Operating range: 15 meters), without signal disturbance and no direction limit. Frequency range: 2.403GHz 2.480GHz Operational voltage: 3.3V Charge Voltage: 4.4V 5.25V Modulation: GFSK channel: 78channels TX Power: less than +5dBm Transmission rate: 1M bit/sec Frequency tolerance: +/-30ppm Power consumption: 55mA(on), 1mA(sleep) Battery Type: Built-in lithium-ion battery Item size: 15 * 10 * 2cm Item weight: 107G Package size: 17 * 14.5 * 3.5cm Package Weight: 175G supports system: 1. Windows 2000/XP/7/8/cu 2. Windows Vista 3. Lynx (Delian 3.1, Red hat - Fedora Ubuntu 8.10-8.10 * 9.0) 4. Android OS (with standard USB interface)