2)3 Air compression devices on each knee compartment: top, left, and right.
3)Compression massage, vibration massage, and heat treatment can work alone or simultaneously with 3 level intensities.
4)Foldable heating pad for either upper knee or lower knee warming therapy with temperature from 45 to 55 Celsius degrees.
5)Compression massage on knees or legs with 3 selective automatic massage modes.
6) Vibration massage and heat therapy create flow in the lower body and release tension around the knees.
7) Auto timer with 15 minutes. 3 timer options by pressing the timer button.
8) Control board on top makes it possible for reversible use for leg massage.