Really?  Once you slide the cuff in place around your upper arm, if you unfasten the velcro fasteners to make the cuff tighter with your free hand , it is liable to fall off or slide out of place unless you have somebody else on hand to help you adjust it.  My doctor has advised me never to attach the cuff this way because it could result in inaccurate readings.  He suggested that if I didn't have another person on hand to wrap the cuff properly around my upper arm, then I should consider a wrist monitor instead.   

Gerald