Subwave Sonar Networking - exchange preset diver-to-driver messages up to 30 M. Monitor tank pressures and depth for up to 8 divers with 10 M range. Multiple Dive Modes. Dive Readiness Tool - gauge when you are best prepared to dive. Diveview Maps. 1.2" AMOLED color display with 200 M dive rating. Dive Log with Garmin Dive app. Up to 30 hours of battery life in dive mode - 10 days in smartwatch mode. Surface GPS. Dive Compass. Tide Data. Case size: 51 x 51 x 16.4mm. Strap fits wrists 135-230mm in circumference - 135-355m with x-long strap.