The Descent™ Mk3i watch can be used with a paired Descent transceiver to view your tank pressure, estimated air time remaining, and estimated gas consumption. When you pair your watch with another diver's transceiver, you can view their depth, distance, and tank pressure. Compatible devices can send and/or receive diver messages within your dive network (Dive Product and Feature Compatibility). For more information about the Descent transceiver, see the owner's manual for your device.