Amazon.com: Felston DD740 Four Input Digital Audio Delay for lip-sync correction : Electronics
Audio Delay Device - Vanco International
ADM-1 Audio Delay Module
Audio Delay Box-Product-AV LINK GROUP LTD.
Sandman Pro – Unfiltered Audio
AD-200 6-Channel Audio Delay/Mixer with Level Adjustment | Datavideo | Datavideo | Professional end-to-end solutions provider for your live video production.