The audio latency for remote iCap transcribers will generally fall in a range from about 250 milliseconds to 500 milliseconds. Precise times depend on the listener's local buffer settings, and also may vary slightly with the ping time between the captioner, encoder source, and iCap reflection server.
iCap audio is sent over UDP with limited buffering and retransmission options. The iCap audio latency will never stack up over the course of a program as it would with some other technologies. However, iCap may be more sensitive than some types of less real-time applications to short bursts of congestion or high latency on a network.