... °C~80°CInstruction for modal choosingM1: the potentiometer is 5K Ohm, MAX from 1.8KΩ±5% to 3.2KΩ±5%,220 ... °M2: the potentiometer is 5K ohm, MAX from 0 to 5K ohm, 50°M3: the potentiometer is 10K ohm, MAX from 6.5K ... 3.5 KΩ±5%,220°M4: the potentiometer is 10K ohm, MAX from 0 KΩ±5% to 10 KΩ±5%,50 ...