It is built-in over-current, over-voltage, short circuit, and over-temperature protection, provides you a safe environment for both watch and charger. One-Step Charging Stand : The charging station built-in a magnetic charger for your smartwatch, strong magnetic allows you to adjust the angle freely without deviating from the charger center. Say goodbye to annoying installation. You can carry this compact portable charger out easier rather than taking long and oversized charger dock. Just slide it into your pocket or hook it on the bag. The keychain design allows you to hang on the keychain to prevent loss when you travel.