Details From Buyer's Real Show - kebidumei Spanish/Russian/English 3 in 1 mini Handheld 2.4G RF wireless Keyboard With Touchpad Mouse For PC Notebook Smart TV Box Features - Multifunction (3 in 1) - wireless keyboard + Touchpad + mouse; small and exquisite. RF 2.4G wireless connection; up to 10m operating distance. Ultra sensitive touchpad with 90-degree flip design. Built-in rechargeable polymer Lithium-ion battery. USB receiver; no driver needed; plug and play. Auto sleep and wake-up function of the keyboard. Ergonomic design; compact and light weight. Can be used for PC; Notebook; Smart TV; HTPC; for Android TV BOX; etc. System Requirements - for Windows 2000 for Windows XP for Windows Vista; Windows CE; Windows 7; Windows 8 for Linux(Debian-3.1; Redhat-9.0; Ubuntu-8.10; Fedora-7.0 tested) for Android OS(with standard USB interface) Specifications - Color - Black RF mode - 2.4Ghz Operating distance - Up to 10 meters Built-in battery capacity - 450mAH Charging voltage - 4.2V ~ 5.05V