A connection can be done by the following: 

iOS

How to connect the sensor

1. Tap on the Menu from Analyze, Training, Live, or Swings screen. 

2. Tap on the My Sensor. 

3. Select the listed sensor.
4. Shake the sensor by facing the Blast logo towards the ground for two seconds, facing the Blast logo towards the sky for two seconds, and repeating until it is connected.
5. The listed sensor will now show connected in the list.

Android

How to connect the sensor 

1. Tap on the menu from the Progress screen. 

2. Tap on the My Sensor. 

3. Select the listed sensor.
4. Shake the sensor by facing the Blast logo towards the ground for two seconds, facing the Blast logo towards the sky for two seconds, and repeating until it is connected.
5. The listed sensor will now show connected in the list.