Collect activity and sleep information along with multiple light measurements, event market button entries, and patient compliance over days, weeks, and even months. The Actiwatch Spectrum Plus features a real watch-face that displays data and time for user convenience. The off-wrist detection software indicates when the device was not worn and reminds the user to put the device back on. It also features a rechargeable battery that eliminates the need for battery changes to wear long-term and provide consistent data monitorting.