... circuit with PID intelligent control, linear output, can be extended to a heating element and a tin pot service life.2, the welding area ... convenient operation.8, vertical machine with sometimes control switch, you can set ten groups on off time.Related parameters:1: AC ... 85-240V, voltage thermostat, heating the core 220V ( can be customized 110V );2, temperature: 0 - 55;In 3, working humidity ...