Function kneading, tapping, rolling, compression & vibration for back synchronous or individual working rolling and air compression for leg/foot massager manual rotating for leg/foot massager auto recliner up and down can match coin box or counter box (selectable) three auto programs for massage chair two auto programs for leg/foot massager Feature the speed of kneading & tapping unlimit adjustable the width of tapping, rolling unlimit adjustable 24v DC adapter aluminum robotic system Specification number of motor: 6 number of roller: 4 number of roller for leg/foot: 12 air package: 4 air control: 2 speed of tapping: 60/m---900/m moving length of rolling: 62cm from head to trail width of kneading: 3.4cm---21cm power supply: 220/110/120v 50/60Hz auto recliner: 95---170degree 2 wheels driven for easy move inside power voltage: 24v dc unlimit adjusting width for rolling & tapping: 3-21cm 3D on waist, neck: 3cm--8cm working noise: less than 43db ability of load: 210kg warranty: 3000 hours