Check whether there are any screws on the back of the remote control first, mainly in two places. One is the battery box, which can only be seen when the battery cover is removed. The other is to check whether there is a sticker on the back of the remote control. If there is a sticker, carefully check whether there are screw holes in the sticker by hand. Remove the screws, and then gently pry open the back cover with a flat-head screwdriver. The remote controller is generally fixed by the buckle, and it is not allowed to pry it open forcibly to avoid damage to the buckle.