I'm not claiming that it uses NTP, but: > NTP can usually maintain time to within tens of milliseconds over the public Internet, and can achieve better than on

I'm not claiming that it uses NTP, but: > NTP can usually maintain time to within tens of milliseconds over the public Internet, and can achieve better than one millisecond accuracy in local area networks under ideal conditions https://en.wikipedia.org/wiki/Network_Time_Protocol#Clock_synchronization_algorithm https://en.wikipedia.org/wiki/Network_Time_Protocol#Clock_sy... The algorithm is more sensitive to variance than latency, but over a LAN variance is usually pretty okay. Wifi can be a lot worse, though, especially if there are a lot of clients.