The Right Spot system consists of modular pads that may be used alone or with the Right Spot sheet and hood. Pads are available in 14" x 14" large size and 6" x 8" small size. The pads portable, each pad is powered by a compact rechargeable battery. The controller for each pad has five level settings and the pads will warm to over 106 degrees F (41 degrees C) on the maximum setting for maximum benefit. The pads will operate for nearly four hours or more on the highest setting. Typical usage is only 15-30 minutes