... Digital thermostats, temperature controllerFeatures:1. Setting temperature value with button, easy to operate2. Self-tuning PID, high accuracy3 ... operation cycle: 15 secondsPulse voltage: drive SSR, DC0/24V, ON: 24V, OFF: OV.operation cycle: 1 secondAlarm Mode0: high error alarm ... the first time)Control ModePID, P, PI, PD, ON/OFFGeneral SpecificationPower voltage: AC85~265V, 50/60HzOperation ambience: ...