Features: *Easy to operate: This rechargeable cordless knee massager comes with a detachable touch screen controller, which is clearly see and makes operation more convenient. *Portable: The knee massager is small and portable, wireless and rechargeable. It has a long standby time and is very convenient to carry. It can relieve knee pain anytime and anywhere. *Heatable design: This knee massager can be heated and heats up quickly. The temperature control system keeps the comfortable temperature constants, which can promote bloods circulation and relieve joint discomfort. *Battery/controller two-in-one: This detachable battery compartment is also a controller. It is simple and easy to use. It can be installed in one second. No power-cord is required. It can be used as an ordinary knee pad when the battery is not installed. *Adjustables design: 34-46cm adjustables leg circumference knee pads are suitable for a variety of leg types, and this massager is multi-purpose and can massage shoulders, elbows, knees, etc. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: ABS Size: Adjustables Leg Circumference: 34-46cm Rated voltage: 3.7v Input voltage: 5V-1A Motor power: 5w Battery capacity: 2000 mAh Interface: Type-C interface Package List: 1 x Knee Massager or 2pcs x Knee Massager