Both were used and cursed. One works but used and with one LED missing and battered. The other is dead and shattered. I asked for 2 replacements. Both parts were NEW. They both work but all the blue terminal blocks were bad so I had to buy and replace all 4 terminal blocks. Even after buying new terminal blocks, that's a good deal for me. They lost 2 stars for used shipping. and bad blocks. They lost 1 star for four bad terminal blocks. They got 2 stars for saving me a week to design and build the device myself. Therefore they get 4 stars.