Review on Enhance Your Diving Experience: Garmin Descent T1 Transmitter - Dive with Multiple Tanks, Monitor Up to 5 Tanks with SubWave Sonar Technology by Anthony Chacon

After only two dives It was clear to me that artificial intelligence was in demand and was not disappointed. The audible chirping was distracting during the first few dives, but after I get used to it, I can't hear it anymore, and it doesn't chirp enough to be heard underwater on my GoPro Hero 8. My exhale on the 620ti is much louder. If you doubt this is related to the MK2i, don't. It costs money and the Garmin software is easy to use to log and catalog all your dives.