Somehow I managed to turn off the annoying beeping sounds. I guess it was done by holding USB button, but I am not sure. Is it possible to connect the P800 to your Wonderfree app, or I can delete the app from the phone because it does not work with the P800 but only with other Oukitel powerstations? AC chargint was only 288 W, but I guess this will restart to full 500W charging after first charge and discharge, right? I hope so, otherwise it is not charging as fast as it should.