Name: Circular Digital Temperature And Humidity External Sensor Product Model: SNT957W-dE Working Voltage: 5V1A Product Power:1.5W Built-in Rechargeable Battery: 3.7V/600mAH Battery Standby Time:5 Hours Alarm Indication: Digital Tube Numbers Flash. (such As Temperature Alarm Flashing Temperature Numbers) Network Distribution Instructions:-SC--AP- Detection Ambient Temperature: -40C-+120C Detection Of Ambient Humidity: 0% To 100% (no Condensation) Temperature And Humidity Measurement Accuracy: 0.5C; 1%RH: Measurement Error: 1C; 3%RH: WIFI Frequency Band: 2.4GHz, The Frequency Band Does Not Currently Support The 5GHz Frequency Band Buzzer Time:30s Product Size: Diameter 77.8mm, Thickness 20.8mm (including Self-adhesive) Features: 1. Atmospheric Light Transmission, Accurate Measurement, Soft And Eye-friendly 2. WiFi Direct Connection, No Gateway Required, No Mobile Phone Card Required 3. After Detecting The High Temperature Alarm, Respond Quickly, The Alarm Will Sound On Site, And The Mobile Phone Will Also Sound An Alarm Prompt. 4. Use WIFI Communication To Upload Data To The Cloud Platform, Access The Cloud Platform Through The Mobile Phone, View Monitoring Data In Real Time, And Quickly Understand The Current Operating Status Of The Equipment. 5. Temperature And Humidity Data Records Can Be Exported And Viewed. Imported Sensors, Professional R&D Team, High Measurement Accuracy, Good Stability, Low Power Consumption Chips, And Stable And Reliable System Operation. Package Included: 1 set * (1 thermometer, 1 sticker)