Adjusting the reference temperature: 5 °C ... 50 °C ; Setting resolution: 0.1 °C ; Setting accuracy: ± 0.1 °C ; Setting stability: ± 0.1 °C/h ; Effective Emissivity: 0.97 ± 0.02 ; Size of the reference surface: Ø 70 mm ; Main features: Possibility to mount on a tripod - 1/4" thread ; Power supply: 100 V ... 240 V AC ;