Frequently asked questions: Q: Does the watch come with a battery inside? A: The watch is equipped with a battery inside, a battery life of up to 2-3 years, the battery is replaceable. Q: Can the watch be waterproof? A: This watch is water resistant to 3 ATM and water resistant to 100ft/ 30M(It is not recommended to wear this watch while bathing or swimming) Q: The first time I opened the box and used it, the hands would not go, why is that? A: There is a catch at the location where the time is adjusted, which needs to be taken off for the watch to work properly. Important information: 1. Click on the seller's name "SHENGKE Watch Official", then "Ask questions" on the right side of the page. 2. Log in to your Amazon account> select "your orders", search for the order number> click "contact seller".