Self Starting Gyroscope Ball Wrist Power Ball Metal Forear Arm Muscle Exerciser Strengthener Rotor Gym Hand Exerciser Gyro Ball|Power Wrists Gyroscope Ball Wrist Power Ball Metal Forear Arm Muscle Exerciser Strengthener Rotor Gym Hand Exerciser Self-starting Gyro Ball Principle: The principle of gyroscope and celestial mechanics, powerful force generated in the rotation by the centrifugal rate and the law of inertia in the main motion arm. The second generation of automatic start section by the spring pulling out of the center of rotation, the traditional start rope to start, suitable for novice and rely on start rope game player. Characteristic: 1. computer calibration ball heart balance, high stability and low noise 2. special durablemetal 3. steel shaft is not easy to break 4. ball shell adopts advanced silicone rubber slip ring, exquisite and beautiful 5. built-in spring to start using the spring center rotation inertia 1) We accept Alipay, West Union, TT. All major credit cards are accepted through secure payment processor ESCROW. 2) Payment must be made within 3 days of order. 3) If you can't checkout immediately after auction close, please wait for a few minutes and retry Payments must be completed within 3 days. 1. WORLDWIDE SHIPPING. (Except some countries and APOFPO)2. Orders processed timely after the payment verification.3. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address.4. The images shown are not the actual item and are for your reference only.5. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season.6. If you have not received your shipment within 45 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction 7. Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery.8. Delivery Time: 1. You have 7 days to contact us and 30 days to return it from the date it was received. If this item is in your possession more than 7 days, it is considered used and WE WILL NOT ISSUE YOU A REFUND OR REPLACEMENT. There are NO EXCEPTIONS Shipping cost is bear by both seller and buyer in half. 2. All returned items MUST BE in the original packaging and you MUST PROVIDE us with the shipping tracking number, specific reason for the return, and your po . 3. We will refund YOUR FULL WINNING BID AMOUNT, upon receipt of the item in its original condition and packaging with all components and accessories included, AFTER BOTH Buyer and Seller cancel the transaction from . OR, you may choose to have a replacement. 4. We will bear all the shipping cost if the product(s) is (are) not as advertised. We maintain high standards of excellence and strive for customer satisfaction Feedback is very important We request that you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns. It is impossible to address issues if we do not know about them