The ShieldLife Lite is designed with a patented technology that virtually eliminates the risk of prolonged exposure to electrical fields. The specially designed heating element shields you from harmful electric fields. Features automatic 10-hour shut off period to ensure the ultimate in sustained and comfortable sleep. Features: Designed with a patented technology. It virtually eliminates the risk of prolonged exposure to electrical fields. The specially designed heating element shields you from harmful electric fields. Features automatic 10-hour shut off period. The ultimate in sustained and comfortable sleep. Relax Muscles Improve quality of sleep Improve blood circulation Relieve neck & back pain Shield Life TheraMat Lite Heated Mattress Pad - Full Size