I always use electronic devices for the first three months when I buy them. During that time, you'll really know if the device works by using it to its full potential. If it fails, it's because the product will never work. I've been impressed with the KINGSONG S16 PRO. I recommend it 100%. I've used it at its maximum power, and it's an extraordinary device that I recommend to those who like limitless adventure. I'm 60 years old, and I use it for work as my means of transportation every day, of course, without performing stunts and using the necessary protective gear.