The thermocycler has a processor controlled block with separately controlled peltier elements for extraordinary temperature homogeneity at high heating and cooling rates. State-of-the-art peltier elements have demonstrated more than 600,000 cycles so far without any failures. This gives more than 15 years of lifetime even under the most demanding conditions, like DNA-sequencing on a daily basis. Two thermocyclers can be connected with a RS232 null modem cable. This allows simple copy of programs or the directory from one device to another. The TFT touch screen in combination with the self-explanatory software is easy to use.