Similar to my idea, before seeing a cloud computer, it was equipped with a Bluetooth mouse and keyboard, of course, otg is the same, and bought a wireless screen projection hardware, the actual effect of watching movies is no problem, but the mouse on the screen delay is very large (no problem on the mobile phone screen). That is, because the wireless projection screen should be due to signal problems, the mouse operation experience is very bad. Later bought mhl equipment, but bought back the equipment failure can not be returned, and then did not toss again, it is recommended to buy a wired screen device directly, and then Bluetooth connected mouse and keyboard.