BSXinsight does not have any physical buttons on it and is meant to be controlled by your mobile phone or other mobile BLE enabled iOS or Android device.
For lactate threshold assessments, your phone will act as the visual display to successfully walk you through the stages of your test. Afterwards it will immediately transmit the results and present them on your screen.
For daily workouts, the phone is used to start and stop recording but does not need to be present the entire time. Once returning to your phone, BSXinsight will automatically reconnect. Data is recorded to your BSXinsight. After an activity, you can see the graph summary, but to get all of the data and be able to download 1 sec time stamp files, you must dock and sync your BSXinsight.
More information on DOCKING, SYNCING & DOWNLOADING