specification: Item Type: Waist Twisting Disc_x000D_Material: PP + Magnetic Bead_x000D_Built-in battery: A button battery_x000D_Battery model: LR44_x000D_Battery Capacity: 160mAh_x000D_Characteristics: Intelligently caculate the number of twists, adding magnetic three dimensional massage foot bottom, thin and without occupying space. Features: 16 Magnetic beads massage foot acupoints, stimulating vitality, feeling the whole body is unblocked. 2Intelligently caculate the number of twists, the count can be reset, calculate the number of twists and master the amount of exercise. 3Three dimensional stereoscopic salient point pressing, fully press the foot acupoints, relex your whole body. 4The internal relative motion uses a method of rolling balls to reduce the exercise resistancegives you a good fitness experience. 5Comfortable worry free and exquisite heart warming design , as a decent gift for parents, relatives, friends, lover, colleagues, etc. PackageList: 1 x WaistTwistingDisc