Each time you tap your fingers, the Tap wearable detects which fingers have tapped and sends a corresponding character or command to your paired bluetooth device.
The Tap Strap consists of five flexible rings, connected together by strips of braided nylon. Each ring contains a three-axis accelerometer, and the thumb ring also contains a six-axis IMU, an optical mouse chip, haptic element, battery, and circuit board. The nylon braid contains conductors that bring the signals from the sensors to the circuit board, where an MCU collects the data, derives the tap combination, and transmits the information via Bluetooth.
The Tap Strap operates in three modes that are automatically activated based on the position of the users hand. The default mode is Keyboard Mode. When the user rests their thumb on a surface, Tap switches to Mouse Mode, and when the thumb is lifted, it switches back into Keyboard Mode. When the hand is turned so that it is perpendicular to the surface, (like shaking hands), then Tap goes into Air Mouse Mode, and when the hand is turned parallel to the surface, (the palm is facing down), it switches back to Keyboard Mode.
You can learn more about How Tap Works, the Tap modes, and see each in action here: https://www.tapwithus.com/how-tap-works/