For the majority of devices there is no app download necessary, the remote will automatically pair with your device via Bluetooth. For Sony Xperia S, HTC One and X+ users, simply download the “Camera 360” app in the google play store to use the remote. Apply For iOS (5.0 Above) / Android system (for Samsung/MOTO/Google/Xiaomi/Sony/HTC etc, Android 4.1 Above) Instructions of self timer 1. Press the power button, LED flashing;2. After power on, press the bluetooth pairing key, LED flash slowly. The bluetooth steps to a state that can be searched and matched;3. Use the mobile phones to match. LED will be out after the success of the pairing;4. Long press the corresponding configuration key. LED will light up after configuration. The product can be used normally at this time.5. Without using for five minutes, the product will automatically enter a dormant state. Please press the power button to turn off the timer when not in use, to ensure that the battery can be used for a long time.6. Can be charged with PC devices or mobile power adapter. LED on --- charging. LED out --- saturation.7.For the Android phones that can not controlled directly via the shutter, please download camera360 software, open camera360 software, click the Settings icon on the upper right corner of the phone, Advanced Settings, and then the camera settings, set the volume button options to take photos. Communication:Bluetooth Version.3.0 Transmit frequency: 2.4GHz-2.4835GHz Battey life:CR2032*1 cell, about 6monthsDimension: 48mm*30mm*10mm Weight: 20g Contents:1 x Bluetooth Remote Control (Battery included)