DO NOT buy Yi cameras - subscription scam
I bought three of these cameras for home security, intending to record onto micro sd cards without paying their expensive subscription fees. Set up was OK but movement detection is hopeless, so the cameras have to be set to record 24/7 which quickly overwrites itself. The worst problem has been ads within the app which have steadily increased, and now I can only use it for 90 seconds at a time before it says free time is up, and I need to pay for a subscription to continue using it. The video quality is very basic and there is no sound from one of the cameras. So they are going in the bin. Total rip off - do not buy.