Bluetooth Wireless Connectivity: The wireless temperature sensor uses a high-end Bluetooth 5.0 chip. Easily monitor temperature and humidity data on CozyTime App via Bluetooth. Detecting range is up to 30m (98ft) without obstructions. Free Data Storage And Export: Store a set of data in 5 minutes intervals, support up to 100 days data storage. One smart device can be connected up to unlimited number of temperature sensors simultaneously. High Accurate Monitor: Temp. range: -20~80℃(-4~176℉) , Humidity range: 0-99%RH. Up to 1s responsive speed always shows you the latest readings. Smart Alert Function: Set preset temp and humidity ranges, and receive an app alert immediately whenever levels fall out of that range, which helps you react faster to sudden changes in your greenhouse. Pocket-sized Design: With a compact and lightweight design. Perfect for monitoring home, pets, refrigerators, freezers, walk-in cooler, wine cellars, etc. CR2032 battery lifespan is about 1 year and can be replaced by yourself. Wireless Range: 30m (98ft) Humidity Range: 0-100%RH Humidity Accuracy: ±3%RH Temp. Range: -20~80°C/-4~140℉ Temp. Accuracy: ±0.3°C/±0.54℉ Battery Model: CR2032 Historical Data: 100 days Smart Alarm: YES Magnetic Back: Yes Material: plastic colour: A-White + Orange / B-White + Purple / C-White + Green Package Contents: 2 x Temperature Sensor CT01 1 x CR2032 batteries 1 x English instructions 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: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!