The GameSir X1 Battle Dock is a smartphone accessory that every mobile Fortnite and PUBG player should have. Why? Well, it lets you play not only these battle royale games, but just about any other titles, with a keyboard and mouse. It consists of an arm to hold your device, a large Bluetooth button for connecting the smartphone, and USB ports on the side. The X1 is powered by a 3000mAh battery, so you should be able to game for hours on end, without needing to recharge it. Product page. Continue reading for two more videos, pictures and information.”This glorified USB hub with a remapper works. Unlike some reviews below, it works with PUBG, you don’t download “hacked versions”, just add the official app in the GameSir app. Open USB debugging and activate the remapper once with included usb cable to the dock and its all bluetooth from there. The lack of english translation is what kills one star from this product but it definitely works,” said one reviewer. More information.