If your device is running Firmware Version 1.5.1 or Older Press and Hold both the increase depth and increase speed buttons together for 3 seconds. Your device will go into Bluetooth Mode and display the Bluetooth symbol on the LCD screen and now will connect with the DermapenWorld app when prompted or the Dp DOCK when placed on it.
If your device is running Firmware Version 1.6.6 or Newer Press the Power Button for 1.5 seconds. Your device will go into Bluetooth Mode and display the Bluetooth symbol on the LCD screen and now will connect with the DermapenWorld app when prompted or the Dp DOCK when placed on it.