1. Brand new and high quality 2. Principle: using the headphone cable to touch off the photo button 3. Plug and play. Support IOS and Android system. For Android system above 4.2.2, if still not work, download the camera 360. For IOS system above 5.0, no need any app, plug into earphone hole and take photos. 4. No need to connect Bluetooth, only using the 3.5mm cable Audio to take photo. 5. No need to charge, No battery built-in.