Refrigeration,defrosting, multi modes fan controlling optional; Return differential control,temperature display resolution 0.1; Multi alarm function. Technical parameters: Temperature measuring range:-50~120 Power supply: 110V AC Relay (Compressor,Defrost,fan) capacity:10A/110VAC Digit display:3 digits display minus digit + status indicators (setting, refrigeration, defrost, alarm) Ambient temperature: -5~50 Relative humidity:10%~90%RH(not condensing) Probe type: NTC(-50~120) PTC(-50~120) Color:Black Material:plastic Product size:77 x 32 x 58mm Package Contents: 1 x Thermostat 2 x probe Only 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.