Interesting gently touch with powerful resonance speaker hidden inside. If you want to feel the vibration / resonance any HIFI music with an output of 50 watts per channel will be valid. Or if you want you can buy the full stereo with reference: EM.3637. 165 x 76 cm. OPTIONAL: HEAT MASSAGE MAT - EM.3612 / 1 MATTRESS COVER FOR MASSAGE - EM.3612 / 2 low heat. Five engines 12v. You can choose different combinations of speeds with the hand controller. 152 x 41 x 5 cm.