MaxKare Large 24 x33 Heating Pad-Gray has a unique contoured design to match the shape of your back and provide targeted heat therapy for back stress relief. The super-soft electric heating pad has an adjustable strap for easy hands-free use. Equipped with ultra-heat technology the pad heats up quickly to deliver therapy when you need it. Four heat settings allow you to adjust the level of intensity to suit your needs. ETL certification 2-hour auto-off lets you relax with peace of mind. Lightweight you can carry it with you to use any time or any place you want.