1.Bluetooth temperature sensor Record data a , and can be used alone for app.you can data for 20 , the mobile phone saves EXCEL for long-term storage, and the computer needs a to connect to EXCEL for long-term storage; 2.The temperature and humidity sensor can perceived temperature and humidity changes , help you to 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 phone&Tablet ,If the sensor is combined with a Bluetooth to WIFI to connect to via the Internet,you can check temperature/humidity date anywhere/anytime; then mobile phones &Tabletscan be remotely monitored for alarm notifications. Real-time monitoring of temperature and humidity 5.One WIFI can connect combined with 20 pieces Bluetooth sensor 1.Temperature & 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%~100%RH 8.Adjustable temperature/humidity report /sensitivity/range 9.Temperature/Humidity high/low/release status will synchronization to app 10. 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.