1.Bluetooth temperature sensor Record data once a minute, and can be used alone for app.you can store data for 20 , the mobile phone saves EXCEL for long-term storage, and the computer needs a gateway to connect to EXCEL for long-term storage 2.The temperature and humidity sensor can perceived temperature and humidity changes , help you to improve the indoor heating and cooling, and make your home more comfortable 3.Low advantage design to long-term battery life The built-in high-precision digital sensor can quickly and accurately find the temperature and humidity changes. 4.Download smart APP on your phoneandTablet ,If the sensor is combined with a Bluetooth to WIFI gateway to connect to via the Internet,you can check temperature or humidity date anywhere or anytime then mobile phones andTabletscan be remotely monitored for alarm notifications. Real-time monitoring of temperature and humidity 5.One WIFI Gateway can connect combined with 20 pieces Bluetooth sensor 1.Temperature and Humidity Sensor 2. APP name: Smart 3. Built-in Battery: CR2477 4. Low-battery remind function 5.Low power undervoltage: 3V 6.Working temperature: -40-60 7.Working humidity: 0 percent -100 percent RH 8.Adjustable temperature or humidity report cycle or sensitivity or range 9.Temperature or Humidity high or low or release status will synchronization to app 10.Format time 24H 11.Battery life: 10-12months Material: plastic colour: As shown Package Contents: 1 x Wifi Temperature Sensor 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.