brand new and high quality Features: With built-in sensor and external sensor, it provide wider measuring range, and will be more accuracy and responded more quickly. Large permanent data memory of 16000 points with USB cable, it is very easy to connect with computers to download data through USB interface. With the management software, you could analyze data in form of tables and graphs and export in picture format. The data could be queried, saved, printed and exported in Word/Excel/TXT format. Multi-function LCD shows temperature status, record capacity, for time, date, Max. and Min. temperature, very convenient. Mainly used for temperature recording during storage and transportation of foodstuff, chemicals and other products, especially widely used in all links of warehousing, logistics and cold chain, such as refrigerated containers, refrigerated trucks, refrigerated package, cold storage, laboratory, etc.. and optional, LCD alarm indicator, buzzer alarm, easy to use. Specification: Material: Plastic Size: app.84 x 44 x 20mm/3.31 x 1.73 x 0.79in Color: White Quantity: 1 Pc Product parameter: Temperature measuring range: -30 - +60; for optional external sensor: -40 - +85 Ambient environmental temperature: -30 - +60 Accuracy: -20 - +40, 0.5;others, 1 Resolution: 0.1 Record capacity: 16000 points (MAX) Record interval: 10s-24hour adjustable Sensor: Internal NTC thermal resistor Communication interface: USB interface Power supply: CR2450 battery or power supply via USB interface (Battery is not included) Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x Temperature and Humidity Recorder 1 x Temperature Sensor 1 x USB Cable 1 x User Manuel