Supply voltage: AC100-250V, 50/60Hz; Rated current : 10A Max. [WIFI Control] The wifi smart thermostat can be controlled by smartphone and voice. Compatible with Alexa and Google Assistant. Use the Smart Life app to control and monitor the temperature from anywhere with your smartphone. Compatible with Android 4.4+ and iOS 9.0+. The application is free, no money is required. Wireless connection: IEEE 802.11 b/g/n 2.4GHz wifi. [Temperature trend graph and temperature calibration] 7X24 hours data recording and output data trend graph . After long-term use or replacing a new temperature sensor, you can calibrate the temperature through the Smart Life APP. Simple, Accurate and PowerfulConnect and use, no installation required. Simultaneous display of measured temperature, maximum and minimum temperature. Support C/F display. Temperature control range of -58~230/-50~110 with 0.1 accuracy. Replaceable metal probe, temperature probe range: -22~221/-30~105. Memory function setting. [Heating and cooling output] Double relay output. Simultaneous connection of heating and cooling equipment. It can cool and heat to maintain the desired temperature. Compressor delay to protect your cooling/heating equipment. Total length 2m. We only sell the thermostat, not other items shown in the picture. Due to the difference between monitors, the picture may not reflect the actual color of the item. Please allow small size errors due to manual measurement.