Specification: Item Type: Temperature Data Logger Material: ABS Equipment Power Supply: DC5V power supply or battery power supply Battery: 1 x 18650 battery 2500mAh (not included) 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: -20-60℃ (-4℉-140℉) Measurement Accuracy: ±0.2℃ (25℃) Recording Capacity: 260,000 groups 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 Data Logger 1 x Data Line 2 x Wall Sticker