1. No. 1 Doctor and Pharmacist Recommended Brand 2. Compatible with Microsoft® HealthVault"; simply connect the unit to your computer using the included USB cable, to log, track and share your readings online using a driver located at http://www.microsoft.com/en-us/healthvault/tools-devices/directory.aspx?type=device&condition=&activity= 3. Dual sensors automatically double check each reading, providing you with added reassurance that each reading is accurate. 4. Hypertension indicator icon alerts you if your reading exceeds internationally recognized guidelines for normal home blood pressure levels 5. Detects irregular heartbeat and alerts you with a special indicator icon so you can consult with your physician 6. 2 User Mode allows 2 users to track 100 readings each separately in stored memory with date and time stamp