[Wireless App Control]We makes use of a high-end Bluetooth 5 chip and may smoothly display screen temperature and humidity records on app through Bluetooth. (Free downloading from App Store and Google Play) [Higher Accurate Monitor]Using an accurate and touchy Sensirion temperature and humidity sensor, it is going to achieve a temperature error of ± 0 ° C (± 1 ° F), a humidity error of ± 3%, and refresh as quickly as in step with moment for increased accuracy. [Data Storage Export]Support temperature data export function, listing a collection of knowledge each 10 seconds, can store as much as one hundred days of data. Data on the APP displays purple when data is beyond preset range. [Portable Design]Wireless sensors Smaller size than different brands(1 x 1 x zero inches). Space-saving and portable. It can be utilized for roughly 1 year withCR2477 battery. [Bluetooth distance range]This product helps a barrier-free distance of fifty meters between the mobile phone and the transmitter Small size and occasional power consumption, the product size is able 1 x 1 x 0. It can measure indoor high temperature, low temperature and conventional temperature, and the scale speed is prompt and the scale temperature is accurate. Smart Bluetooth app, join as much as 100 on the identical time. Temperature range: -20-60 ° C (-4-140 ° F); humidity range: 0-99%. Support temperature data export function, directory a group of data each 10 seconds. Use CR2477 battery,and battery would be replaced. Reminder: Android phones must activate geolocation when connecting to sensors. Colour:White Material:plastic Size:15 x 35mm Package Contents: 1 x Host 1 x English handbook 1 x Card Needle Removal (for battery removal) Only the above package content, other merchandise aren't included. Note: Light mirrored image and diverse exhibits may cause the color of the object in the picture a bit of diversified from the real thing. The dimension allowed error is +/- 1-3cm.