Can I place the device on my arms or lower back?

No. Quell is designed to be worn on the upper calf 1-2 inches below the knee.  If you cannot place your Quell device at the recommended location just below the knee due to situations such as wound or skin irritation, then you may position the device at mid-calf or above the knee on the lower thigh.  The device should be recalibrated at the new site before initiating therapy.