How to charge the watch? 1. Take out the charging cable in the product box; 2. Connect the charging cable to the watch; 3. Plug the charging cable into the power source; 4.Please charge the watch more than 3 hours first time. Note: Please do not use a computer or laptop to charge the watch, because the voltage of the computer and laptop is too low, and it takes a very long time to charge the watch to have enough energy.