Moblock means it is a Mobilelock Bluetooth sensor. The one at the top of the list should have the lowest signal number which means it has the highest signal strength. This should be the sensor you have right next to the Mobilelock. Select it, name it and then click “Add Selected Sensor”. It is only at this time that your Mobilelock will connect with the sensor to configure it and it is then that it knows which specific sensor it is.