Title: The terminal heads are hollow
Review: I used this inverter on our camping trip and was very disappointed in the materials they used. The terminal head (black) was accidental hit and was bent. I looked closer to find that the terminal black head connection is made of a light metal and was broken half way and was only attached to both ends by a cork screw thread. I managed to get it working by pushing back the bolt end and was able to get a connection. To prevent this from happening again you would need to protect this unit with a padded case. 400 watts power is enough for camera or cell chargers or to pump up an air mattress, don't expect this unit to do much more then that. Because of the terminal heads and how delicate they are, I would not recommend this product.
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