The Vivisual Ace now comes with an additional ball replacement feature, making it easy to replace worn-out balls. Simply remove the rubber cover, a process that only takes 30 seconds.The Vivisual Ace has been upgraded with an adjustable elastic cord and direct metal attachment to prevent breakage and looseness. The flexible and compact option to add weight with sand or water increases stability for all skill levels and make it more admirable. These upgrades improve performance and usability, making it a great choice for anyone looking to improve their skills conveniently and effectively.The Vivisual Ace helps users of all levels practice basic strokes and ball spin variations, improving their technique and form. Its versatility and consistency make it a popular tool among tennis coaches and players of all levels. It also enhances footwork by delivering balls at different heights and angles, resulting in noticeable improvements. You can practice different drills with the trainer, making it an excellent choice for anyone looking to enhance their tennis skills.The Vivisual Ace is designed to be compact, durable, flexible, and stable for a comfortable and effective workout experience. It is a convenient and versatile option that can be used anywhere, including at home, at the office, providing consistency in training regardless of weather conditions. Weighing only 3.76 lb without the removable weight bag, it is much more flexible to carry around. It only takes 3-5 minutes to assemble initially and does not require dismantling and re-setup.The Vivisual Ace is improved, and the new design enables more effective training compared to traditional tennis training devices that are heavy and costly. We are confident in its quality and offer a full money-back guarantee if you aren’t satisfied with your purchase. Watch the video and also give it a try - see for yourself! Product Description Vivid Yellow The eye-catching neon yellow hue Exceptionally vibrant in natural daylight and becomes more pronounced under artificial lighting. No Bald Patches Uniformly Applied The outer layer of VIV tennis balls is well covered with felt, providing texture and grip. Remarkable Resilience Kids Tennis Rackets A Combo Set with Carrying Case ViviFun Kit Brings Outdoor Joy and Activity to Kids. Keep Your Children Engaged and Active! 1 Ball's Standout Color 2 Ball's Felt Cover 3 Ball's Super Elasticity 4 ViviFun Kids Set 5 Vivisual Ace Trainer Unveil the Structure of VIV Balls: A Tri-Layer Design for Superior Performance! Rubber Plug The design aims to replace the worn balls super easy and cost saving Thickened Steel Pole The steel pipe has been reinforced to prevent deformation and improve its ability to withstand compression. Stable Base Underneath each of the base's four feet, there is an anti-slip and shock-absorbing mat to help hold the base in place and reduce vibrations. Portable Thickened Weight Bag Adding water to the base is an easy way to increase its weight significantly and operate it effectively. VIV Tennis Rebounder Solo/Self Training Ball with String, Easy Design & Portable VIV Product Catalog Unit 50 (balls) 1 (bag) 1 (set) 1 (set) 30 (balls) 3 (balls) 1 (set) Include Balls Ages all all kid all all all all Package Size (in) 10x8x6 29x1514 18x14x3 26x4x4 12.52 x 11.02 x 6.93 8x3x3 10x10x4 Package Weight (lb) 5 4 0.75 4 1 0.5 3