Features: It is reusable, one internal temperature sensor and one external temperature sensor with -40℃ to +85℃ wide range. It features LCD alarm indication, buzzer alarm, free software support for MAC/WIN, 10s-24h adjustable log interval, ℉/℃ selectable temperature unit. Internal NTC temperature thermal sensor and optional external sensor, data export in PDF/EXCEL via data management software. Wide range of application, it is widely used in transportation, clean rooms, laboratories and factories. It satisfies the dynamic and growing demand for cost effective temperature data logger in cold chain supply. Support for 16,000 data recording capacity with USB connection cable. Specification: Condition: 100% Brand New Material: Plastic External Temperature Range: -40℃ to +85℃ (-40℉ to 185℉) Internal Temperature Range: -30℃ to +60℃ (-22℉ to 140℉) Ambient Environmental Temperature: -30 ℃ to +60 ℃ Temperature Accuracy: ± 0.5℃ (-20℃ to +40℃) ;± 1℃ (other range) Temperature Resolution: 0.1℃ Log Interval: 10 seconds- 24 hours Memory: 16000 Temperature Points Interface: USB Interface Power Supply: CR2450 Battery or power supply via USB interface (Battery Not Included) Size: Approx. 84 x 44 x 20 mm / 3.3 x 1.7 x 0.8 in Package List: 1 x Temperature Data Logger (Battery Not Included) 1 x 1.1m External Sensor 1 x USB Cable 1 x User Manual Note: 1. When the external sensor is inserted to the logger, the internal sensor will not work. 2. For first time use, please download our free software firstly then connect the logger to a for WIN or for MAC system to set the parameter such as log interval, temperature unit(℉/℃), alarm limit and so on. When you click Save Parameter button, the time on the logger will sync with your local time. 1、It is reusable, one internal temperature sensor and one external temperature sensor with -40℃ to +85℃ wide range 2、It features LCD alarm indication, buzzer alarm, free software support for MAC/WIN, 10s-24h adjustable log interval, ℉/℃ selectable temperature unit 3、Internal NTC temperature thermal sensor and optional external sensor, data export in PDF/EXCEL via data management software 4、Wide range of application, it is widely used in transportation, clean rooms, laboratories and factories 5、It satisfies the dynamic and growing demand for cost effective temperature data logger in cold chain supply