Aeris A300 AI Dive Computer with Digital Compass and USB Interface Free on-line training class! Dual Algorithm with Deep Stop Uncluttered Operational Displays with Large, Easy-to-Read Digits & Expanded Green, Yellow and Red Bar Graphs provide critical data "at-a-glance" Intuitive User Interface with Dot-Matrix Menu and "Step Back" & Universal Icons Designed, manufactured and tested IN THE USA