TNP 2.4GHz Wireless Mini Keyboard Remote Control with Multi-Touch Trackpad Touchpad for PC Pad HTPC XBMC Raspberry pi IPTV Google and Android TV Box (Black) A great portable solution for presentations, gaming, HTPC control, mobile device control, etc. Built-in rechargeable Lithium-Ion battery charges via any standard USB port 2.4GHz USB wireless receiver, 20 feet effective distance, The included USB intension cable to get stronger signal It include 2.4Ghz dongle,plug it into device USB Port to work for HTPC, Android and Google Smart TV, Raspberry Pi Three-in-One multimedia wireless keyboard with Auto sleep and wake up feature