Features Build In Storage Function: This electronic temperature and humidity meter has a built in storage function that records temperature and humidity data every 10 minutes, the data can be exported to a CSV file and can be shared with friends. Compact And Convenient: This electronic temperature and humidity meter is small and lightweight, which is easy to carry and doesn't take up too much storage space, and the top carrying design allows you to hang it on the wall hook. MEMS Sensor: This electronic temperature and humidity meter uses MEMS digital temperature and humidity sensors to provide stable and accurate measurements, as well as a 1 second per refresh rate. Excellent ABS Material: This electronic temperature and humidity meter is made of excellent ABS material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. Wide Application: This electronic temperature and humidity meter has a wide range of applications and can be used for green house, pharmacy, indoor, agricultural farming, warehouse. Specification: Item Type: Hygrometer Thermometer Material: ABS Battery Type: Coin Cell CR2477 x 1 ( Shipped With Built In Battery ) Battery Capacity: 1000mah Package List:1 x Hygrometer Thermometer1 x Card Removal Needle1 x Manual Package List 1 x Hygrometer Thermometer 1 x Card Removal Needle 1 x Manual