TheStack Radar uses connectionless Bluetooth technology. There is no pairing with your phone/tablet required, just turn on TheStack Radar (notice the bluetooth icon flash at the top of the screen) then open TheStack App and start your session.  Unlike other Bluetooth connections you may be used to, you will not need to go to your Settings App on your phone to pair.
Here is a step-by-step guide:Turn on TheStack Radar by holding down the Power button until you hear a beep and the screen display is visible.
Launch TheStack app.  Access Settings from the Menu and select Stack Radar
The Bluetooth connection between the radar and the app will be shown on the screen prior to starting your workout.  You can also change your radar selection from this screen.
If swing speed data is being displayed on the TheStack Radar screen, but not in TheStack App, then please ensure that Bluetooth is enabled in your device Settings.
If Bluetooth is enabled, but swing speeds are not being sent to TheStack app, then force close TheStack app, turn off the TheStack Radar and repeat the steps above.
Please watch this video for instructions on where to place TheStack Radar while swinging.
Where to Place TheStack Radar