Model: ETC-974Temperature measure range: NTC probe:-50-110C(-58-230F); PTC probe:-55-140C(-67-284F)Display resolution: 1C/0.1C(with the swithch mode between integer and decimal)Accuracy: NTC:0.5C(-30C-50C);other1C. PTC:1C(-30C-50C); other2CProbe type: NTC(-50C-120C); PTC(-50C-150C) supply:230VAC10% ;50/60HzRated current of the relays(refrigeration ,defrost and fan):8A/220VACUse temperature:-5C-55CRelative humidity:10%-90%RH (not condensing)Storage temperature:-30C-85CInput: NTC sensorSensor lenth:2M(include the probe): Temperature ControllerDisplay Type: DIGITALUsage: Household Type: ChargerStyle: Standing and Wall HangingDisplay Size: 1.9 Inches & Undercolor:BlackMaterial:plasticsize:77 x 34.5 x 58mmPackage Contents:3 x ETC-974 Digital Temperature ControllerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.