Universal Fit -The designed universal size fits for most office chairs. It's included a home adapter for home,office use. Best gifts for Women Men. MONEY BACK GUARANTEE :For any reason, if you are not 100% satisfied with this heating pad, just return it within 30 days & get your money back. Safe & Reliable- The seat warmer with Heat pads is equipped with overheat protection thermostat controller that is UL listed,rigorously tested for quality control and safety. Each heating pad with auto shut off feature ensures safe use. The timer is 30mins to automatically switch off. Fast Heating – The Heated seat cushion has 3 heating pads for full back and seat area, provides heat therapeutic for back and hips, thighs. It is a nice seat warmer in winter. The back heater and seat heater can work separately. 2 heat levels are available. Fast heat-up, reach 114?at low level and 131? at high level. Customizable Setting -The massage seat cushion allows you choose massaging area: Neck,Upper back,Lower back,Seat, combines all of these areas together, all-inclusive 5 programmed modes and 3 variable massage intensities to give you the best massage you can customize. Vibration Massage, NOT Shiatsu -The back massager with 10 vibrating motors and heat function, provides soothing gentle massage for back,thighs to help relieve stress,tension and muscle pain. It is vibrating massager only, not a shiatsu massager with roller balls.