The product is arrived broken due to a poor packaging. Two heavy electronics boards with a flyback transformer only protected by a small plastic layer in the package. The boards hit each other during all the transport and one board is broken (the flyback transformer ferrite is broken). Furthermore the seller asked me if I could repair the board by myself without proposing any solutions (send a new transformer for instance). Moreover the resistor 1k 15W is really hot and should be replaced by a 25W model. To sum up poor board, poor delivery.