about this item:

Airbag Massage | Warm Compress | Built-In Battery | Multiple Modes | One-Key Control Calf Massager – Relieves fatigue, leg pain, and stiffness while promoting blood circulation. Multifunctional – Multiple modes with one-button control, adjustable intensity. Adjustable Size – Fits up to 22.5-inch leg circumference, lightweight (0.9 lbs), wireless with a large-capacity battery. Great Gift – Ideal for athletes or those with stiff legs, perfect for home or travel.