produced more than acceptable given the low price. instructions in English but not a problem for me, if not used google translation. the first was the hs control buttons, but the sav is super fast (in China) after an email they m 'proposed either a refund or the sending of a new without reference from the old. the new has arrived and it works great. nb: I use for egg incubator has, adjustment s performed, adjusting the degree and the extent to tenth.