1Achieve effective pneumatic massage by inflating and deflating. 22 massage modes: take turns to knead and massage, inflate, squeeze, deflate and squeeze massage. 315 minutes timing function, there are 9 power levels to adjust, easy use. 4Powered by USB and 5V2A power supply. Can also be powered by mobile power supply (not included) when going out, convenient to use. 5Effective limb pneumatic massage can effectively eliminate edema, promote blood circulation to eliminate fatigue, also suitable for bedridden patient to prevent muscle atrophy.