Thank you for viewing. Power operation has been confirmed. There is no instruction manual. Dr. Air 3D Air Stretch Mat Model Number: EAM-01 Color: BROWN Massage Type: Seat type Dimensions: Width 500 x Height 125 x Depth 910mm (when the headrest is folded) / Width 500 x Height 90 x Depth 1020mm (when the headrest is extended) Weight: Approximately 2.4kg (main unit only) Accessories: AC adapter 〈Product Description…Quoted〉 The 3D Air Stretch Mat is a simple design, just lie down and press a button. It's easy, so it's an item that's easy to continue using. With the stimulation of vibration and a comfortable temperature, the relax heater function and vibration function are combined to warm up the stiff body, and by transmitting vibrations from the lower back to the back, you can expect a relaxing effect that will make you fall asleep.