Fangrui Product Details 1. Remote Control: Connect S1 Wi-fi Temperature Control; Wi-fi Up To 2.4ghz, Then You Can Adjust The Screen Or Position Temperature Adjustment On Your Phone Through The App Anytime And Anywhere. 2. Single Relay Output: Support One Device. Automatic Switch 3. The 2.4-inch High-definition Screen Displays The Set Temperature And Measured Temperature Values At The Same Time. 4. Support Temperature Calibration.temperature Setting Switch, Support C Or F 5. Tuya App And Smart Life Support Precautions: 1. Metal Magnetic Probes And Temperature Do Not Place Probes Or Metal Wires In Fire. 2. Metal Magnetic Probe Do Not Put The Probe In Water, It May Cause Inaccurate Measurement. 3. Only Use 2.4ghz Wi-fi Support (ieee 802.11b/g Support) 4. Wireless Connection: Wi-fi Connection For Ios And Android (tuya App Or Smart Life) Product Description: Control Type: Temperature Control Mode: Intelligent Temperature Control Regulator Temperature Range: -20~120c (c) Temperature Measurement Error: 1c (c) Installatio