?Built-in rechargeable battery?it can last for 50 hours playing time after one time fully charging. You don’t have to take off your phone case when you mount the triggers on your phone. ?Wide Range Appliable? Designed for all kinds of iPhone and Andriod Phones with thickness not more than 13mm. It can fit for tons of shooting games including PUBG, Fortnite, Call of Duty, Knives Out, Rules of Survival, Survivor Royale, etc. As long as the game allows customizing and draging the keys. ?Simple Operation?With these PUBG mobile controller, you can simultaneously move, turn, aim and shoot by using the index fingers to press the buttons, which can eliminate the trouble that use thumbs only to make all operations. Do not need to connect with bluetooth and any APPS. ?4 Shooting Speeds?The left trigger is high frequency trigger. This trigger has 4 Shooting Speeds which can be selected according to your like and your gun type. Maximum click 40 times per second. Running M16, SKS, Mini 14, SLR, MK47 as an automatic shooting gun. Using capacitive space mapping technology, support one-button switching between normal mode and continuous click mode, in the continuous click mode, it can automatically click the screen continuously at max 40 times per second. ?Using Tips?These Mobile Game controllers are using the sensitive real mouse micro switch inside. So there are several phones which have the electromagnetic problems. This will cause the triggers touch the screen automatically. Please do not worry about this and you just need to turn off the screen and turn on again. This issue will solved right away.