Input voltage: 100~240V~50Hz/60Hz, temperature setting range: -20 ° C~120 ° C, accuracy within temperature setting range: ± 1 ° C, temperature probe short circuit (or temperature probe temperature out of range) display E-1, no output and flashing alarm displayed Temperature probe open circuit (or temperature probe probe out of range) displays E-2, no output and flashing alarm. 1. Press these two buttons separately to adjust the start temperature. 2. Press these two buttons separately to adjust the stop temperature. There are two working modes: heating mode and cooling mode. Heating mode: start temperature and stop temperature. When the real-time temperature is lower than the start temperature, there is an output. The output is turned off until the real-time temperature is higher than the stop temperature. Cooling mode: Start temperature, stop temperature When the real-time temperature is higher than the starting temperature, there is an output until the real-time temperature is lower than the stopping temperature. Turn off the output while holding down both buttons to correct the real-time temperature between -9.9 ° C and+9.9 ° C. Restore factory settings: Press and hold simultaneously Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC100-240V Color: White Material: plastic Package Contents: 1 * temperature controller socket 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.