Can Tobii Pro Glasses 2 accept TTL signals for synchronization?

Tobii Pro Glasses 2 Tobii Pro

The Tobii Pro Glasses 2 recording unit has ] a standard 3.5 mm jack synchronization port. The tip is used for receiving a synchronization signal, the middle ring is used for transmitting the synchronization signal, and the sleeve, which is ground.
It is used for both in- and outbound synchronization, emitting and receiving standard TTL 3.3 V signals, described as a high signal (1 (one)), or a low signal (0 (zero)).