One of the bigst advantas of the new iser is the innovative temperature control system that makes the iser different from other models on the market Due to the precise temperature control system you avoid the oxalic acid turning into formic acid The isation is more steady effective and much quicker than other models. The iser is also very easy to clean. The iser can be used with oxalic acid crystalic (a small 2 g measuring cup is included) or with oxalic acid tablets., Manufacturer: ZKLGS