La description

1. Safety Regulation
 1) Please use a separate breaker with a power capacity more than *6A
     when using the charger.
 2) Do NOT use in a humid place.
 3) Store in cool and dry places.
 4) It is advised NOT to disconnect the power line from the main
      power while being operated.
 5) Disconnect the line connected to the battery first and then, disconnect
     the power line in order to stop charging while being operated.
 6) Do NOT use in dusty places.
 7) Do NOT use in hot places with the direct sunlight and flammable
     substances.

2. Pre-use precautions
 1) Please use after reading this user manual thoroughly.
 2) Please check the condition of the connector and wiring connections
     connected to the battery.
 3) Please check the power line connection.
 4) Do NOT use a defective battery.
 5) Use single phase **0V for power voltage.