Extra/Replacement SX-1 Transmitter/Shaft Insert - This is NOT a full System-1.
The SX-1 Transmitter/Shaft Insert is the heart of the System-1. This lightweight (70g) device contains the sensors necessary to measure your golf swing and the wireless link necessary to get the data out in real time.
Note: This is ONLY the transmitter/shaft insert, not the full System-1, and is intended as an additional component. To purchase a complete System-1, please see our full System-1 models.