Detailed Product Description1. Size:160 x 190 ( But we will make sample with 140 x 200 ) 2. The kind of stone: Jade, tourmaline, germanium, medical stone 3. Swatch: Aritifical leather 4. The way of stone attachment: Back ultra way 5. Wire: Silicon, bimetal, sensor 6. Controller: Digital controller 7. Tourmaline, germanium: Emit negative ion +-2000 8. We will use the layer that emits negative ion +-1000 You can check the amount of negative ion with negative ion checker. 9. Super long wave = about 400 gause