Single Dumbbell for Keep Workout Fitness Exercise Equipment,White Fashionable appearance, compact and convenient, can be carried out at any time indoors, no need to choose a venue The handle is designed according to the ergonomic principle to a comfortable feel Spiral vibration devices are added on both sides, and the motion principle of dynamic inertia is adopted Through the rhythmic back and forth vibration, it produces a vibration frequency that has a good effect on relaxing the human body The exercise time is short and the effect is quick. Only 6 minutes of aerobic exercise a day can achieve the purpose of relieving neck discomfort, arms and beauty. Colour: White Material: plastic + iron Package Contents: 1 x dumbbell Only the above package content, other products are not included. Note: Light 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.