1.Effective Air Pressure: Min:120 mmHg / Mid:140 mmHg / Max: 160 mmHg 2.Built-in curved modules fit calves contour perfectly, and provides extra comfort while in use 3.3 massage modes and 5 different massage intensity to cover a wide range of therapeutic and relaxation needs 4. user-friendly smart controller 5.Relaxes your legs, and be energetic Enhances sports performance, and increases muscular flexibility Hand-free rehabilitation tools for recovery from muscular strains Reduces lymphatic swelling, and prevents varicose veins and leg cramps Accelerates vein and lymph backflow, promotes circulation, and enhances metabolism Hands-free massage to enjoy massage while laying or sitting Super quiet operation with zero disturbance Zipper wearable technology with fashionable and trendy style Product Name: Air Wave Leg Massager Charging voltage: 5V Battery capacity: 2000mAh The word difference does not affect the use. Color: Black Material: plastic Package Contents: 1 x Controller 1 x Leg sleeve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.