I didn't received my order, but celler refund my money. I didn't know what was the problem, it may be a bad logistic.
The title says 30A. But actual working current is 10A. Very low. The product is missing a wiring diagram. Wiring is not intuitive. I asked for help from the seller, but he/she was very hostile: I had to prove I bought the product at their store, by showing the packaging. Next, they did not know anything about the product, and told me to use google to fix it myself.