How to replace the battery of a thermometer hygrometer

Real-time monitor temperature and humidity data;
2. Send notifications when out of  desired settings;
3. 20 days history data storage, data can be exported and shared with others;(more than 2 years data can check from mobile APP)
4. Support to customize device name, application scenarios, and scene pictures;
5. Support Bluetooth and wifi connection with mobile phone, which can monitor the temperature and humidity anywhere

Measuring range: its temperature measuring range is -5~50℃ (23°F~122°F), while its humidity measuring range is 0% ～ 95%RH with its sampling period of 10 seconds, which makes it very suitable for most application contexts such as household, guitar case, green house, RV, Cold Chain, brewing,office and labs.