Features 1、If record once in 10 minutes, once full can work continuously for one year. 2、The recording interval, alarm interval, timing start and stop, upper and lower limits of temperature and humidity can be modified through software. 3、Connect to the computer via a USB cable, the software automatically reads all the data in the device and generates a data curve. 4、Equipped with a high‑accuracy temperature and humidity sensor for accurate temperature and humidity measurement. 5、The product has a large LCD screen, which can display real-time temperature and humidity values and other data. 6、Built-in buzzer, with over-limit alarm function, can automatically change the frequency of recording alarms. Specification Item Type: Temperature and Humidity Data Logger Material: ABS Equipment Power Supply: DC5V power supply or battery power supply Battery: 1 x 18650 battery 2500mAh (bring your own) Recording Interval: 5s-18h Measurement Update: 2-255 seconds can be set Battery Life: 1 full charge device can work continuously for 1 year Maximum Battery Cycle Charge and Discharge Times: 1200 times Measuring Temperature Range: -40-80℃ (-40℉~180℉) Measuring Humidity Range: 0-100%RH Measurement Accuracy: ±0.2℃ (25℃) typical value (temperature) ±2%RH (5~95%RH, 25℃) typical value (humidity) Uses: This thermometer and hygrometer is widely used in every link of the family housing, computer room, workshop, storage, drug store, laboratory, library, office, logistics cold chain and other places to monitor and record the environmental temperature and humidity. LWH: Approx. 120 x 113 x 33mm / 4.7 x 4.4 x 1.3in Package List 1 x Temperature and Humidity Data Logger 1 x External Sensor 1 x Sensor Bracket 1 x Data Line 2 x Wall Sticker