When you're purchasing QSMOTOR 12inch 3000W 72V 70kph Hub Motor with EM72100SP controller and kits for electric Scooter, it's best to stay with reputable retailers. Look for titles you recognize and organization. Although you hope the purchase will work flawlessly, almost always there is the chance you'll have a problem and need to return the item. Buying from a merchant that has available online customer service, a good go back policy, and a proven status will make any repairs needed much simpler. Be sure the check-out is secure. When you reach the payment page, there should be a tiny icon that looks like a padlock in your navigation bartender. This is the symbol for a attached site; if it isn't now there, be wary. To obtain even bigger security, pay for your products through a third party site. These will keep your information safe and will often offer special savings on items purchased using their system.