After-sales service: √ We offer 30 days return policy without any reason, 60 days replacement if the product has quality problems √ KILL BORING TIME: Because the top is small, easy to carry and easy to use. It can be rotated in small space like tablet, cell phone and books. You can play around on different occasions to kill the boring time. For example, waiting for friends, waiting for a car, taking a car, taking a plane, etc.√ SIMPLE AND PRACTICAL FEATURES: Based on experience , Offer an exercise technique that suits most people's habits. Use your thumb and middle finger to hold the top of the top firmly, place the top perpendicular to the floor (it can be a top chassis, glass or ceramic tiles), 1-3 cm above the floor, and then rotate them parallel. Rotation time and balance are determined by the magnitude and direction of the force. Need practice to get the best results.√ THE BEST AND INDIVIDUAL GIFT: Can be a perfect gift for men, women, teenagers, father, mother and friend etc anxiety, help you quit smoking etc. And as a piece of art, it is so eye-catching everywhere.