Ultra Premium Wrist BP Monitor with PC Software HEM-670IT... Omron's HEM-670ITN not only features A.P.S. technology which confirms monitor is at heart level for more accurate readings, and also includes Omron Health Management Software (Bi-Link) which will help track your progress to better blood pressure health. This wrist monitor detects advanced diagnostics including morning hypertension and irregular heartbeat. Monitoring these important factors with Omron's software allows you to share valuable information with your physician. Cuff fits wrist sized 5-1/4 to 8-1/2" in circumference."