The IRIS (Infra-Red Interface System) allows you to transfer data and dive logs to your PC via USBconnection. Software included allows you to view and manage your dive data and add additional information to build a complete divelog. The built-in dive simulator can be a useful diver training and dive analysis tool. Two year limited warranty.Works with these dive computers:Nemo and Nemo ExcelM2 RGBMMC2 RGBMM1 and M1 RGBMAirlabDarwin and Darwin Air