Inappropriate sleep positions can have significant negative effect on many forms of sleep-disordered breathing, such as UARS, sleep apnea and snoring. Irrespective of the types of breathing disorders, left/right lateral is regarded as the best sleep position. As a tool for people to self-monitor their sleep positions and for sleep doctors to monitor the efficacy and the compliance of the positional treatment, ReFleX SleepAnglesTM is designed to wirelessly collect patients’ sleep angle data and automatically compile them into comprehensive reports ready for review by individuals or sleep doctors.